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Monte Bello Open Space Preserve Weather

Park • San Francisco Bay Area

Monte Bello Open Space Preserve takes in the upper Stevens Creek watershed, 3,436 acres of grassland and creekside forest between Monte Bello Ridge and Skyline Ridge. Its main trailhead is on Page Mill Road. The San Andreas Fault runs through the canyon, and the Stevens Creek Nature Trail follows it back to the parking lot. On the eastern rim stands Black Mountain, the peak early settlers could see from the town they named Mountain View. The Midpeninsula Regional Open Space District manages the preserve, and its only campground sits near the summit.

48°
😐
Comfort Score
63(C+)
Good
Colder than usual · typical high 61°
Weather updated November 15, 2026 at 4:00 AM PST

Plan your week

10-Day Forecast

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  1. Today
    Nov 15
    55°45°
    Comfort
    41
    86%
    Rain 0.36 in
  2. Mon
    Nov 16
    48°40°
    Comfort
    36
    87%
    Rain 0.56 in
  3. Tue
    Nov 17
    52°39°
    Comfort
    51
    69%
    Rain 0.02 in
  4. Wed
    Nov 18
    51°46°
    Comfort
    36
    98%
    Rain 2.9 in
  5. Thu
    Nov 19
    49°47°
    Comfort
    35
    91%
    Rain 0.54 in
  6. Fri
    Nov 20
    52°42°
    Comfort
    63
    30%
    Rain 0.13 in
  7. Best day
    Sat
    Nov 21
    53°42°
    Comfort
    66
    25%
    Rain 0 in
  8. Sun
    Nov 22
    49°43°
    Comfort
    57
    32%
    Rain 0.04 in
  9. Mon
    Nov 23
    55°44°
    Comfort
    65
    31%
    Rain 0 in
  10. Tue
    Nov 24
    57°50°
    Comfort
    58
    56%
    Rain 0.34 in
See hiking scores for every trail this week →

Hour by hour

Hourly Forecast

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  1. Today
    Now
    48°
    Comfort
    63
    1%
    0 in
  2. Today
    5 AM
    48°
    Comfort
    63
    1%
    0 in
  3. Today
    6 AM
    48°
    Comfort
    63
    1%
    0 in
  4. Sunrise6:48 AM
  5. Today
    7 AM
    48°
    Comfort
    60
    1%
    0 in
  6. Today
    8 AM
    49°
    Comfort
    58
    1%
    0 in
  7. Today
    9 AM
    50°
    Comfort
    60
    2%
    0 in
  8. Today
    10 AM
    52°
    Comfort
    67
    2%
    0 in
  9. Today
    11 AM
    54°
    Comfort
    69
    2%
    0 in
  10. Today
    12 PM
    54°
    Comfort
    70
    2%
    0 in
  11. Today
    1 PM
    55°
    Comfort
    72
    4%
    0 in
  12. Today
    2 PM
    54°
    Comfort
    70
    13%
    0 in
  13. Today
    3 PM
    52°
    Comfort
    62
    21%
    0 in
  14. Today
    4 PM
    51°
    Comfort
    49
    33%
    0.02 in
  15. Sunset4:58 PM
  16. Today
    5 PM
    49°
    Comfort
    29
    68%
    0.12 in
  17. Today
    6 PM
    47°
    Comfort
    49
    67%
    0.02 in
  18. Today
    7 PM
    46°
    Comfort
    47
    67%
    0.01 in

Current Conditions

Temperature
48°F
Feels like 44°F
Humidity
92%
Dew point 46°F
Wind
9 mph
NW • Gusts 16 mph
Cloud Cover
100%
Mid-level clouds
Precip Chance
1%

Comfort Breakdown

Less comfortableMore comfortable
Thermal49
Wind93
Moisture100
Precipitation100

Monte Bello Open Space Preserve weather today and through the year

It's 48°F at Monte Bello Open Space Preserve right now (feels like 44°F), with 9 mph wind and a comfort score of 63. Today's forecast high at Monte Bello Open Space Preserve is 55°F, 6°F below the mid November normal of 61°F. Fog is forecast to linger into the afternoon today at Monte Bello Open Space Preserve. In November, fog here often lingers all day. The best window today is 10 AM to 1 PM, at about 46°F with a 8 mph wind (comfort 47).

August is the warmest month at Monte Bello Open Space Preserve, with an average high of 80°F. December is the coldest, with an average low of 40°F. February is the wettest month (8.1 in.), out of about 40.9 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Monte Bello Open Space Preserve are July, August, and September. The best hours are usually 10 AM to 1 PM in July, 10 AM to 1 PM in August, and 10 AM to 1 PM in September.

Monte Bello is a deep bowl. Monte Bello Ridge and Black Mountain wall it off from the Santa Clara Valley, Skyline Ridge closes the western side, and Stevens Creek drains out the bottom. That gives the preserve two climates a short walk apart. Sunny, dry grassland covers the ridges, and cool, shaded forest fills the canyon a few hundred feet below. The Canyon Trail drops about 400 feet into it from Page Mill Road.

Forecast updated November 15, 2026 at 4:00 AM PST. Climate figures come from NOAA 1991-2020 normals. Hourly patterns come from NOAA's HRRR hourly analysis from September 2014 to April 2026.

What to expect at Monte Bello Open Space Preserve in the next few days

No active National Weather Service alerts for this location.

Fog

Fog is forecast to linger into the afternoon today at Monte Bello Open Space Preserve. In November, fog here often lingers all day.

Best time to go

The best window today is 10 AM to 1 PM, at about 46°F with a 8 mph wind (comfort 47).

Hiking conditions

Best hiking day this week: Friday, with 4 daylight hours that are dry, 45 to 80°F, and under 18 mph wind. 1 of the next 7 days have at least 4 such hours.

Best day this week

Of the next 7 days, Friday looks best for Monte Bello Open Space Preserve, with a 52°F high and midday comfort near 61. Thursday looks weakest (39).

Rain

Next good chance of rain: today (86%, about 0.36 in.).

Live weather map

Weather around Monte Bello Open Space Preserve right now

Overcast and 48° at Monte Bello Open Space Preserve right now.

Live weather map
About the live weather map for Monte Bello Open Space Preserve

The map centers on Monte Bello Open Space Preserve and stacks fog, satellite clouds, and precipitation radar on one view. Clouds come from the GOES-West satellite and rain from NOAA radar, and both show current conditions. Fog comes from our HRRR-based fog model, and the slider steps through its forecast for the next 12 hours.

Dots mark nearby places with their current temperature, colored by comfort score. Use the layer buttons to turn any layer off, or open the full map for every destination in the region.

Nearby Temperature Comparison

Conditions at nearby San Francisco Bay Area destinations

Tip: Bay Area temperatures can change by 20 to 30°F over a short distance because of microclimates.

Monte Bello Open Space Preserve vs nearby places

Typical summer conditions compared with Monte Bello Open Space Preserve, from the same NOAA HRRR hourly record. The list shows the closest places, then nearby places whose climate differs the most.

Summer climate at places near Monte Bello Open Space Preserve
PlaceDistanceSummer afternoonsMorning fogAfternoon windCompared with Monte Bello Open Space Preserve
Skyline Ridge Open Space1.1 misame26%8 mpha very similar climate
Russian Ridge Open Space2 mi-2°F36%9 mpha very similar climate
Los Altos Hills4 mi+6°F16%9 mphabout 49% less rain a year and 1,802 ft lower
Año Nuevo State Park16.8 mi-16°F42%14 mphabout 16°F cooler on summer afternoons and windier summer afternoons (14 vs 8 mph)
Moss Beach23.3 mi-15°F66%9 mphmore summer morning fog (66% vs 26% of morning hours) and about 15°F cooler on summer afternoons
Montara24.1 mi-17°F60%8 mphabout 17°F cooler on summer afternoons and more summer morning fog (60% vs 26% of morning hours)

Places with a climate like Monte Bello Open Space Preserve's

Climate Dashboard

Current conditions vs. NOAA normals and recent destination baseline

Today's High vs Normal
55°Fforecast
6° below normal
Normal: 61°F
Rainfall Year-to-Date
17.4"
44% below average
30-yr avg: 30.8"
Sunny Days
22last 28 days
3 more than baseline
Recent baseline: 19
Foggy Days
4last 28 days
About average
Avg Wind Speed
7.5 mphlast 28 days
Typical conditions
Recent baseline: 7.8 mph
Comfort Score
8528-day avg
On par with typical
Recent baseline: 85
What the Monte Bello Open Space Preserve climate comparisons mean

These cards compare recent conditions at Monte Bello Open Space Preserve with the available local baseline. Temperature and year-to-date rainfall use long-term normals when available. Fog, sunshine, wind, and comfort use the matching recent or modeled baseline identified on each card.

Positive and negative differences describe how Monte Bello Open Space Preserve departs from its own usual pattern. They should not be read as a direct comparison with another city or as a forecast beyond the period shown.

Monte Bello Open Space Preserve weather by month

August is the warmest month at Monte Bello Open Space Preserve, with an average high of 80°F. December is the coldest, with an average low of 40°F. February is the wettest month (8.1 in.), out of about 40.9 in. a year. Morning fog peaks in May, when fog or low cloud covers 35% of the hours from 6 to 10 AM. July has the clearest middays, with clouds covering about 13% of the sky from 11 AM to 3 PM.

By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Monte Bello Open Space Preserve are July, August, and September. The best hours are usually 10 AM to 1 PM in July, 10 AM to 1 PM in August, and 10 AM to 1 PM in September.

Typical monthly weather at Monte Bello Open Space Preserve. Highs, lows, and precipitation: NOAA 1991-2020 normals. Fog, cloud, and wind: NOAA's HRRR hourly analysis from September 2014 to April 2026. Comfort is the average daytime score from the Monte Bello Open Space Preserve hourly climatology.
MonthAvg highAvg lowRainRainy daysMorning fogMidday cloudAfternoon windDaylightComfort
Jan56°F41°F8.1 in1221%33%9 mph9.9 h11
Feb56°F40°F8.1 in1219%29%10 mph10.8 h14
Mar59°F40°F6.0 in1023%34%10 mph11.9 h16
Apr62°F41°F2.9 in728%29%9 mph13.1 h57
May67°F45°F1.3 in535%27%9 mph14.2 h69
Jun74°F49°F0.3 in226%15%9 mph14.7 h86
Jul79°F53°F0.0 in125%13%8 mph14.5 h92
Aug80°F54°F0.1 in128%13%8 mph13.5 h92
Sep79°F53°F0.1 in223%17%8 mph12.3 h91
Oct72°F49°F1.8 in615%17%8 mph11.1 h81
Nov61°F43°F4.2 in816%23%8 mph10.1 h60
Dec55°F40°F8.0 in1225%32%9 mph9.6 h10

Morning fog is the share of hours from 6 to 10 AM with fog or low cloud. Midday cloud is the average from 11 AM to 3 PM, and afternoon wind is the average from 1 to 5 PM. The highlighted rows are the most comfortable months.

In summer, recent daily NOAA readings at Monte Bello Open Space Preserve average about 5°F cooler than the 1991-2020 normals. The normals average over a wider area that also covers nearby terrain. Read the monthly highs as a rough range, and use the recent months below for what Monte Bello Open Space Preserve has actually seen.

What makes Monte Bello Open Space Preserve's weather different

When the fog burns off

2 PMwhen May fog usually thins (39% foggy at 8 AM)

Fog or low cloud covers Monte Bello Open Space Preserve in 39% of 8 AM hours in May, the foggiest month. It usually thins to a third of that by 2 PM. October mornings are the least foggy (15%).

Wind

9 mphtypical afternoon wind, with no strong daily build-up

Monte Bello Open Space Preserve has no strong afternoon wind build-up. Afternoons average about 9 mph year-round, and February is the windiest month, with hourly averages near 10 mph.

Elevation

+6°Fsummer afternoons at Los Altos Hills, 1,802 ft down

Los Altos Hills sits 1,802 ft lower, 4 miles away. Its summer highs average 6°F warmer and its winter lows 1°F milder than Monte Bello Open Space Preserve.

Daylight

9.6–14.7 hof daylight, Dec to Jun

Days at Monte Bello Open Space Preserve range from about 9.6 hours in December to 14.7 hours in June. In mid-June the sun sets around 8:30 PM, and in mid-December around 4:57 PM.

Seasons at Monte Bello Open Space Preserve

  • Warm seasonJun 29 – Sep 29 · highs 76°F+

    The warm season lasts about 3.1 months, from Jun 29 to Sep 29, when the average high is 76°F or warmer. Highs peak around Aug 8 at about 80°F.

  • Cool seasonDec 2 – Mar 2 · highs 58°F or lower

    The cool season runs from Dec 2 to Mar 2, when the average high is 58°F or lower. The coldest nights come around Dec 8, with an average low near 40°F.

  • Rainy seasonOct 26 – Apr 25 · 91% of the year's rain

    The rainy season runs from Oct 26 to Apr 25, when a day has at least a 21% chance of measurable rain. That stretch brings 91% of the year's rain.

The dark line marks today. Season dates come from the smoothed daily NOAA 1991-2020 normals. Counting from Oct. 1, a typical year has its first inch of rain by Oct 18 and half of its annual total by Jan 25.

Days per year and extremes (Nov 1, 2024 to Oct 31, 2026)

This record runs from Nov 1, 2024 to Oct 31, 2026. Over this record, Monte Bello Open Space Preserve averaged 1 day a year at 90°F or hotter and no freezing nights. It averaged 17 days a year with at least half an inch of rain and 7 afternoons with wind of 20 mph or more at 2 PM. About 119 mornings a year had 3 or more hours of fog or low cloud.

In the same record, the hottest day was Sep 9, 2026 (90°F) and the coldest night was Feb 18, 2026 (33°F). The wettest day was Feb 5, 2025 (3.09 in.), and the strongest 2 PM gust was 53 mph on Feb 4, 2025.

  • 1day at 90°F or hotter
  • 0nights at or below freezing
  • 17days with ½ in. of rain or more
  • 7afternoons with 20+ mph wind
  • 119mornings with 3+ hours of fog or low cloud
  • Hottest day90°FSep 9, 2026
  • Coldest night33°FFeb 18, 2026
  • Wettest day3.09 inFeb 5, 2025
  • Strongest 2 PM gust53 mphFeb 4, 2025

What shapes Monte Bello Open Space Preserve's weather

The height of Monte Bello puts it near the top of the summer marine layer, the cool, moist air the ocean feeds ashore. From Black Mountain on summer evenings you can watch fog come in from the coast and break over the Peninsula like a giant wave. The district notes that this is why it is often called waterfall fog. On many of those evenings the summit stays clear, looking out over the gray layer below.

At night cold air drains off the ridges into Stevens Creek Canyon. On clear mornings the creek bottom along the Nature Trail can be noticeably chillier than the ridgetop. Winter storms rising over the Santa Cruz Mountains drop far more rain here than on the valley floor below. The valley lies in the mountains' rain shadow, the drier zone on the side away from the ocean.

The dry season brings fire risk to the open grass. Early on August 1, 2025, a fire burned about 3 acres of grassland and oak woodland in the preserve before rangers, county firefighters and CAL FIRE contained it. A ranger living on site reported it, and one of the district's smoke sensors flagged it as well.

Tips for visiting Monte Bello Open Space Preserve

  • Park on Page Mill Road

    The main lot has 51 spaces, 7 miles west of Highway 280 and 1.5 miles east of Skyline Boulevard. Los Trancos Preserve's lot directly across the road takes the overflow.

  • Reserve the backpack camp ahead

    Black Mountain Backpack Camp is a 1.5-mile hike with a 500-foot climb from the parking area. A permit and reservation are required.

  • Plan for a camp with no fires

    Wood and charcoal fires are prohibited at the camp, and all stoves are banned when the National Weather Service declares a Red Flag Warning for critical fire weather.

  • Carry your drinking water

    Water at the camp is not safe to drink untreated. Bring your own, or a purifier.

  • Leave dogs at home

    Dogs aren't allowed in Monte Bello Preserve.

Monte Bello Open Space Preserve through the seasons

Spring (March–May)
Creeks run, the grassland is green, and the shaded Stevens Creek Nature Trail is at its best before the canyon dries out.
Summer (June–August)
Summer brings warm afternoons on the open ridges and cool forest in the canyon. Evenings on Black Mountain are the time to watch fog spill in from the coast.
Fall (September–November)
The grass is at its driest in early fall, and fire danger stays high until the first soaking rain. Clear days give long views across the Santa Clara Valley to Mount Hamilton.
Winter (December–February)
Winter brings the wettest months of the year, and trails turn muddy. Skid Road, White Oak and part of the Stevens Creek Nature Trail can close to bikes and horses in wet conditions.

Activities and the weather that matters

  • Stevens Creek Nature Trail: This 3-mile self-guided loop drops 450 feet into the creek's headwaters. The forested creek section stays cool on warm afternoons.
  • Mountain biking the Canyon Trail: The Canyon Trail is the spine of the trail system and a favorite with riders. Ride the connecting trails in dry weather only, since they close when wet.
  • Backpacking on Black Mountain: Clear nights bring sunsets and views over the valley lights. Red Flag days ban stoves, so plan cold meals.

Official sources and current conditions

Numbers on this page come from NOAA data. The text draws on the official sources linked above.

Historical Climate Data

Long-term weather patterns and climate data

Data sources: Recent temperatures come from NOAA URMA and recent precipitation from NOAA Stage IV. Fog, cloud, wind, humidity, and sunshine come from NOAA HRRR, and long-term baselines from NOAA 1991-2020 climate normals.

Climate Overview

Based on NOAA 30-year temperature/rain normals (1991-2020) with recent fog/sun baseline

82
Avg Comfort
66.8°
Avg High
45.6°
Avg Low
68%
Perfect Days
☀️ Avg Sunshine (recent)8.9h/day
🌫️ Avg Fog (recent)1.9h/day
💧 Avg Annual Rain40.9"
🌧️ Rainy Days/yr77 (21%)
🌫️ Foggy Days/yr (recent)90
✨ Perfect Days (80+)498

🌟 Best Months to Visit

1. June85
73.9° / 48.9° · ☀️ 12.5h
4 foggy days · 2 rainy days
2. August84
80° / 53.8° · ☀️ 11.3h
4 foggy days · 1 rainy days
3. July80
79.2° / 53.3° · ☀️ 12h
7 foggy days · 1 rainy days

⚠️ Challenging Months

1. December27
55.3° / 39.5° · ☀️ 5.3h
💧 8" · 12 rainy days · 10 foggy days
2. February34
56° / 40° · ☀️ 6.5h
💧 8.1" · 12 rainy days · 8 foggy days
3. January38
55.8° / 40.5° · ☀️ 6.6h
💧 8.1" · 12 rainy days · 6 foggy days

Monthly Breakdown

MonthComfortHigh/Low☀️ Sun🌫️ Fog💧 RainPerfect
November 20247453.9° / 45.6°6.4h6d3.93"13
December 20246855.7° / 47.8°5.2h12d7.04"13
January 20257652.8° / 42.9°6.9h6d0.18"17
February 20256853.3° / 44°6.3h9d10.81"12
March 20256552.5° / 42.9°7.1h16d4.21"10
April 20257857.6° / 47.1°9.1h10d0.8"18
May 20258664.5° / 50.1°11.3h10d0.24"22
June 20259670.4° / 57°12.9h2d0"29
July 20259271.4° / 56.5°12.2h8d0"29
August 20259576.4° / 63.6°11.4h3d0"29
September 20258772.5° / 60°9.4h10d0.4"22
October 20258463.5° / 52.5°7.6h6d1.69"21
November 20257559.7° / 50.7°6h9d4.89"18
December 20257156.6° / 48.1°5.4h8d5.65"16
January 20267556.9° / 49.5°6.3h6d5.97"20
February 20267055.8° / 47.7°6.8h7d6.22"14
March 20269367° / 56.3°9.6h3d0"26
April 20267657.2° / 46.9°8.8h9d4.64"16
May 20268663.3° / 51.1°11.7h11d0.35"21
June 20269270.4° / 55.9°12.2h6d0.02"26
July 20269474.3° / 60.7°11.7h6d0.04"30
August 20269376.7° / 64.6°11.2h5d0"28
September 20269270.8° / 57.5°10.2h7d0.04"25
October 20268669.3° / 59.2°8.2h4d0.13"23
Last updated: 11/9/2026

Climate Trends

Average Temperature by Month

80°F70°F60°F50°F40°FNov '24Dec '24Jan '25Feb '25Mar '25Apr '25May '25Jun '25Jul '25Aug '25Sep '25Oct '25Nov '25Dec '25Jan '26Feb '26Mar '26Apr '26May '26Jun '26Jul '26Aug '26Sep '26Oct '26
Average High
Average Low
About the Monte Bello Open Space Preserve climate charts

The temperature chart compares average monthly highs and lows at Monte Bello Open Space Preserve, showing both the seasonal cycle and the typical day-to-night range. The comfort chart summarizes how often the combined weather pattern is favorable rather than judging temperature alone.

Precipitation shows the total recorded or modeled rainfall for each month at Monte Bello Open Space Preserve. Sunshine compares average bright-sky hours with the daylight available, while fog shows the average number of morning fog or low-cloud hours per day. Switch between the chart tabs to compare the same months across each measure.

Hourly Temperature, Fog, Wind, Cloud Cover, and Solar Radiation Patterns

Average local hour by month from 2014-09-30 to 2026-04-30

  • Temperature: At Monte Bello Open Space Preserve, the warmest typical hour is 2 PM in August (77°F). The coldest is 7 AM in February (44°F).
  • Fog: Fog or low cloud covers Monte Bello Open Space Preserve in 39% of 8 AM hours in May, the foggiest month. It usually thins to a third of that by 2 PM. October mornings are the least foggy (15%).
  • Wind: Monte Bello Open Space Preserve has no strong afternoon wind build-up. Afternoons average about 9 mph year-round, and February is the windiest month, with hourly averages near 10 mph.
  • Cloud Cover: July middays are the clearest at Monte Bello Open Space Preserve (13% average cloud cover), and March middays are the cloudiest (34%).
  • Solar Radiation: The strongest typical sun at Monte Bello Open Space Preserve comes at 1 PM in July, averaging 1001 W/m².
How to read the hourly heatmaps for Monte Bello Open Space Preserve

This heatmap shows how average temperature at Monte Bello Open Space Preserve changes by hour and month. Read left to right for the seasons and top to bottom for the time of day. Warmer colors mark the usual afternoon peaks, and cooler colors show overnight and winter lows.

This heatmap shows when fog or low cloud is most likely at Monte Bello Open Space Preserve. Darker cells mark the months and hours when fog has been most common. They help separate overnight or morning fog from cloud that tends to linger into the afternoon.

This heatmap shows the typical hourly wind pattern at Monte Bello Open Space Preserve through the year. It makes recurring afternoon wind, calmer overnight periods, and seasonal changes easier to compare than a single daily wind value.

This heatmap shows average cloud cover at Monte Bello Open Space Preserve for every month and hour. Use it to see whether cloudiness is mainly an overnight and morning pattern or commonly persists during the part of the day you plan to visit.

This heatmap shows the average solar radiation reaching Monte Bello Open Space Preserve by month and hour. Brighter cells indicate the strongest typical sun, while muted cells can reflect nighttime, shorter winter days, cloud cover, smoke, or terrain shading.

Each cell combines one month with one local hour. Hover over or focus on a cell for its value and sample coverage. The red marker shows the current month and hour.

Loading interactive climate heatmaps…

How recent months compared at Monte Bello Open Space Preserve

  • October 2026 recap: October 2026 at Monte Bello Open Space Preserve averaged a high of 69°F, 6°F warmer than October 2025 (64°F).
  • Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 29.5 in. of rain to Monte Bello Open Space Preserve, 72% of the 40.9 in. normal.

Location Details

📍
Coordinates
37.3242, -122.1733
⛰️
Elevation
2,124 ft
🏷️
Type
Park
🏷️
Tags
#above-fog#views#hiking#geology

Monte Bello Open Space Preserve weather questions

Everything you need to know about weather and visiting Monte Bello Open Space Preserve

What is the weather like at Monte Bello Open Space Preserve today?

It's 48°F at Monte Bello Open Space Preserve right now, with a comfort score of 63 (good). Today's forecast high at Monte Bello Open Space Preserve is 55°F, 6°F below the mid November normal of 61°F. The best window today is 10 AM to 1 PM, at about 46°F with a 8 mph wind (comfort 47).

What is the best month to visit Monte Bello Open Space Preserve?

By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Monte Bello Open Space Preserve are July, August, and September. The best hours are usually 10 AM to 1 PM in July, 10 AM to 1 PM in August, and 10 AM to 1 PM in September. The warm season lasts about 3.1 months, from Jun 29 to Sep 29, when the average high is 76°F or warmer. Highs peak around Aug 8 at about 80°F.

What are the warmest and coldest months at Monte Bello Open Space Preserve?

August is the warmest month at Monte Bello Open Space Preserve, with an average high of 80°F. December is the coldest, with an average low of 40°F.

When does the fog burn off at Monte Bello Open Space Preserve?

Fog or low cloud covers Monte Bello Open Space Preserve in 39% of 8 AM hours in May, the foggiest month. It usually thins to a third of that by 2 PM. October mornings are the least foggy (15%).

How much rain does Monte Bello Open Space Preserve get?

February is the wettest month (8.1 in.), out of about 40.9 in. a year. The rainy season runs from Oct 26 to Apr 25, when a day has at least a 21% chance of measurable rain. That stretch brings 91% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 29.5 in. of rain to Monte Bello Open Space Preserve, 72% of the 40.9 in. normal.

How does Monte Bello Open Space Preserve weather compare with Los Altos Hills?

Los Altos Hills sits 1,802 ft lower, 4 miles away. Its summer highs average 6°F warmer and its winter lows 1°F milder than Monte Bello Open Space Preserve.

What kind of place is Monte Bello Open Space Preserve?

Monte Bello Open Space Preserve takes in the upper Stevens Creek watershed, 3,436 acres of grassland and creekside forest between Monte Bello Ridge and Skyline Ridge. Its main trailhead is on Page Mill Road. The San Andreas Fault runs through the canyon, and the Stevens Creek Nature Trail follows it back to the parking lot. On the eastern rim stands Black Mountain, the peak early settlers could see from the town they named Mountain View. The Midpeninsula Regional Open Space District manages the preserve, and its only campground sits near the summit.

What is Monte Bello Open Space Preserve weather like in November?

November at Monte Bello Open Space Preserve averages a high of 61°F and a low of 43°F, with 4.2 in. of rain over about 8 rainy days. About 16% of morning hours are foggy. Afternoon wind averages 8 mph.

💡 Local Tip: San Francisco Bay Area weather can change dramatically within short distances and throughout the day. Always check current conditions before visiting Monte Bello Open Space Preserve.

Data sources and methods

Rendered 2026-11-15T12:16:26.350Z.