Los Altos Hills Weather
Town • San Francisco Bay Area
Los Altos Hills is a rural-zoned town of large hillside lots climbing from Foothill Expressway toward Monte Bello Ridge, with no downtown and narrow two-lane roads. Much of its open space is privately owned. Residents get around on a town pathway network linking neighborhoods to Midpeninsula open space preserves, Rancho San Antonio and Arastradero. Byrne Preserve along upper Altamont Road and the town-run Westwind Community Barn keep its horse-country character. Hidden Villa's farm and trails sit in the Moody Road canyon at the town's western edge.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Los Altos Hills weather today and through the year
It's 53°F at Los Altos Hills right now (feels like 49°F), with 7 mph wind and a comfort score of 76. Monday's forecast high at Los Altos Hills is 56°F, 10°F below the mid November normal of 66°F. The best window today is 10 AM to 1 PM, at about 54°F with a 3 mph wind (comfort 60).
August is the warmest month at Los Altos Hills, with an average high of 80°F. December is the coldest, with an average low of 40°F. January is the wettest month (4.1 in.), out of about 20.9 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Los Altos Hills are June, September, and July. The best hours are usually 10 AM to 1 PM in June, 10 AM to 1 PM in September, and 10 AM to 1 PM in July.
Height and slope make small differences between Los Altos Hills and the Los Altos and Mountain View flats below. Much of the town lies a few hundred feet above the valley floor on open hillsides. Summer afternoons there are as warm as the flats or warmer, and the afternoon Bay breeze arrives a little weaker. The fog that spills over Skyline Ridge on summer evenings usually breaks up before it gets here, though some July and August mornings start gray.
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 Los Altos Hills in the next few days
No active National Weather Service alerts for this location.
Best time to go
The best window today is 10 AM to 1 PM, at about 54°F with a 3 mph wind (comfort 60).
Best day this week
Of the next 7 days, Friday looks best for Los Altos Hills, with a 60°F high and midday comfort near 78. Today looks weakest (48).
Rain
Next good chance of rain: today (85%, about 0.31 in.).
Live weather map
Weather around Los Altos Hills right now
Overcast and 53° at Los Altos Hills right now.
About the live weather map for Los Altos Hills
The map centers on Los Altos Hills 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.
Los Altos Hills vs nearby places
Typical summer conditions compared with Los Altos Hills, from the same NOAA HRRR hourly record. The list shows the closest places, then nearby places whose climate differs the most.
| Place | Distance | Summer afternoons | Morning fog | Afternoon wind | Compared with Los Altos Hills |
|---|---|---|---|---|---|
| Los Altos | 1.8 mi | same | 14% | 9 mph | a very similar climate |
| Mountain View | 3.5 mi | -2°F | 17% | 10 mph | a very similar climate |
| Monte Bello Open Space Preserve | 4 mi | -6°F | 26% | 8 mph | about 96% more rain a year and 1,802 ft higher |
| Año Nuevo State Park | 20.7 mi | -22°F | 42% | 14 mph | about 22°F cooler on summer afternoons and more summer morning fog (42% vs 16% of morning hours) |
| Montara | 23.3 mi | -23°F | 60% | 8 mph | about 23°F cooler on summer afternoons and more summer morning fog (60% vs 16% of morning hours) |
| Pacifica | 24.8 mi | -24°F | 56% | 9 mph | about 24°F cooler on summer afternoons and more summer morning fog (56% vs 16% of morning hours) |
Places with a climate like Los Altos Hills'
- Union City (16 mi away): nearly the same temperatures every month
- Fremont (15 mi away): similar temperatures through the year
- Gilroy (41 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Los Altos Hills climate comparisons mean
These cards compare recent conditions at Los Altos Hills 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 Los Altos Hills 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.
Los Altos Hills weather by month
August is the warmest month at Los Altos Hills, with an average high of 80°F. December is the coldest, with an average low of 40°F. January is the wettest month (4.1 in.), out of about 20.9 in. a year. Morning fog peaks in July, when fog or low cloud covers 18% of the hours from 6 to 10 AM. June 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 Los Altos Hills are June, September, and July. The best hours are usually 10 AM to 1 PM in June, 10 AM to 1 PM in September, and 10 AM to 1 PM in July.
| Month | Avg high | Avg low | Rain | Rainy days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 60°F | 40°F | 4.1 in | 8 | 11% | 31% | 5 mph | 9.9 h | 61 |
| Feb | 62°F | 42°F | 4.1 in | 8 | 9% | 26% | 7 mph | 10.8 h | 63 |
| Mar | 66°F | 44°F | 3.2 in | 7 | 8% | 30% | 8 mph | 11.9 h | 66 |
| Apr | 68°F | 45°F | 1.5 in | 5 | 6% | 25% | 9 mph | 13.2 h | 77 |
| May | 72°F | 49°F | 0.6 in | 3 | 7% | 23% | 10 mph | 14.2 h | 80 |
| Jun | 78°F | 52°F | 0.1 in | 2 | 11% | 13% | 9 mph | 14.7 h | 89 |
| Jul | 80°F | 55°F | 0.0 in | 0 | 18% | 13% | 9 mph | 14.5 h | 87 |
| Aug | 80°F | 55°F | 0.0 in | 1 | 18% | 13% | 8 mph | 13.5 h | 86 |
| Sep | 80°F | 53°F | 0.1 in | 1 | 12% | 16% | 8 mph | 12.3 h | 88 |
| Oct | 75°F | 49°F | 0.9 in | 4 | 10% | 17% | 7 mph | 11.1 h | 85 |
| Nov | 66°F | 44°F | 2.1 in | 6 | 9% | 21% | 5 mph | 10.1 h | 77 |
| Dec | 59°F | 40°F | 4.1 in | 8 | 13% | 32% | 5 mph | 9.6 h | 58 |
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.
What makes Los Altos Hills' weather different
When the fog burns off
10 AMwhen July fog usually thins (29% foggy at 8 AM)
Fog or low cloud covers Los Altos Hills in 29% of 8 AM hours in July, the foggiest month. It usually thins to a third of that by 10 AM. April mornings are the least foggy (6%).
When the wind picks up
1 PMwhen afternoon wind builds, March–October
From March through October, wind at Los Altos Hills typically builds after 1 PM. In May it peaks around 5 PM, averaging 11 mph with 6% of those hours windy, while mornings average 4 mph.
Elevation
−6°Fsummer afternoons at Monte Bello Open Space Preserve, 1,802 ft up
Monte Bello Open Space Preserve sits 1,802 ft higher, 4 miles away. Its summer highs average 6°F cooler and its winter lows 1°F colder than Los Altos Hills.
Daylight
9.6–14.7 hof daylight, Dec to Jun
Days at Los Altos Hills 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 Los Altos Hills
- Warm seasonJun 26 – Sep 28 · highs 78°F+
The warm season lasts about 3.1 months, from Jun 26 to Sep 28, when the average high is 78°F or warmer. Highs peak around Aug 8 at about 80°F.
- Cool seasonNov 27 – Feb 28 · highs 64°F or lower
The cool season runs from Nov 27 to Feb 28, when the average high is 64°F or lower. The coldest nights come around Dec 8, with an average low near 40°F.
- Rainy seasonNov 16 – Apr 2 · 80% of the year's rain
The rainy season runs from Nov 16 to Apr 2, when a day has at least a 20% chance of measurable rain. That stretch brings 80% 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 Nov 3 and half of its annual total by Jan 26.
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, Los Altos Hills averaged 16 days a year at 90°F or hotter and no freezing nights. It averaged 12 days a year with at least half an inch of rain and 1 afternoon with wind of 20 mph or more at 2 PM. About 49 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Jun 11, 2026 (99°F) and the coldest night was Jan 10, 2026 (36°F). The wettest day was Feb 5, 2025 (1.74 in.), and the strongest 2 PM gust was 53 mph on Mar 12, 2025.
- 16days at 90°F or hotter
- 0nights at or below freezing
- 12days with ½ in. of rain or more
- 1afternoon with 20+ mph wind
- 49mornings with 3+ hours of fog or low cloud
- Hottest day99°FJun 11, 2026
- Coldest night36°FJan 10, 2026
- Wettest day1.74 inFeb 5, 2025
- Strongest 2 PM gust53 mphMar 12, 2025
What shapes Los Altos Hills' weather
The hillsides of Los Altos Hills also help on winter nights. On clear, calm nights cold air slides downhill and pools in the creek canyons and on the flats below. Hillside homes often stay milder than the valley floor, while the bottoms of Adobe and Hale creek canyons can be the coldest spots in town.
Dry grass, oak woodland and chaparral, a dense shrubland, make wildfire the main weather hazard in Los Altos Hills. PG&E may shut off power when a Red Flag Warning, the Weather Service alert for critical fire weather, comes with heat, very dry air and strong gusts. That combination has historically hit the town about once or twice a year. It comes mostly during fall offshore winds, which blow dry air from inland toward the coast.
In winter, heavy rain brings hillside erosion, downed trees and road closures rather than broad flooding. The town asks property owners to clear drainage and check trees before the rainy season.
Tips for visiting Los Altos Hills
Use the pathways, not the roads
The town's pathway system crisscrosses Los Altos Hills and links to surrounding open space. Bicyclists should stay on hard-surface paths and yield to horses and walkers.
Expect power shutoffs on fire-weather days
PG&E may cut power when a Red Flag Warning, temperatures over 80°F, humidity below 20% and strong winds line up. Keep phones charged and a flashlight handy on those days.
Sign up for alerts
The town sends emergency updates through Nixle and AlertSCC, and urges residents to evacuate if they feel unsafe even before an alert arrives.
Leave early on high-risk fire days
Most roads in town are two lanes and not very wide, and fire access roads are not escape routes, so leave early on high-risk days.
Ride from Westwind Barn
The town-run barn sits next to Byrne Preserve, and its pathways lead to the riding trails at Rancho San Antonio and Arastradero.
Los Altos Hills through the seasons
- Spring (March–May)
- Spring brings green hillsides and the best months for the pathways and Byrne Preserve, before the grass dries.
- Summer (June–August)
- Summer afternoons are hot and sunny on the open slopes, with a lighter breeze than the valley. Walk or ride early.
- Fall (September–November)
- Fall is peak fire weather. Red Flag Warnings and offshore winds can bring PG&E power shutoffs that last until crews inspect the lines.
- Winter (December–February)
- Winter storms bring the risk of hillside erosion, fallen trees, power outages and road closures. It is also the wettest season, so unpaved paths turn muddy.
Activities and the weather that matters
- Walking the town pathways: Mornings and evenings are best in summer, since many paths cross open, sunny hillsides. Mud slows the unpaved paths after winter rain.
- Horseback riding: Westwind Barn connects to miles of maintained trails. Spring and fall are the best seasons, and summer afternoons are hot and dusty.
- Visiting Hidden Villa: The ranch and trails at 26870 Moody Road sit in a shaded canyon that stays cooler than the open hillsides on warm days.
Official sources and current conditions
- Town of Los Altos Hills: Wildfire preparedness
- Town of Los Altos Hills: Public Safety Power Shutoff
- Town of Los Altos Hills: Open Space and parks
- Hidden Villa: visit
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
🌟 Best Months to Visit
⚠️ Challenging Months
Monthly Breakdown
| Month | Comfort | High/Low | ☀️ Sun | 🌫️ Fog | 💧 Rain | Perfect |
|---|---|---|---|---|---|---|
| November 2024 | 84 | 64.1° / 46.8° | 6.4h | 0d | 2.09" | 23 |
| December 2024 | 76 | 62° / 45.8° | 5.4h | 5d | 3.86" | 14 |
| January 2025 | 86 | 61.1° / 42.1° | 6.9h | 1d | 0.1" | 23 |
| February 2025 | 80 | 62.7° / 45° | 6.8h | 2d | 5.87" | 17 |
| March 2025 | 86 | 63.5° / 46.3° | 8.6h | 0d | 2.25" | 24 |
| April 2025 | 93 | 69.2° / 48.3° | 9.8h | 1d | 0.43" | 26 |
| May 2025 | 96 | 76.3° / 51.6° | 12.1h | 1d | 0.12" | 31 |
| June 2025 | 96 | 78° / 53.7° | 12.6h | 0d | 0" | 30 |
| July 2025 | 94 | 79° / 57° | 11.5h | 6d | 0" | 31 |
| August 2025 | 91 | 83.1° / 58.5° | 11h | 6d | 0" | 31 |
| September 2025 | 93 | 81.3° / 61.1° | 9.7h | 1d | 0.08" | 29 |
| October 2025 | 91 | 73.7° / 54° | 8.1h | 1d | 0.95" | 29 |
| November 2025 | 82 | 65.7° / 49.8° | 6.6h | 7d | 2.68" | 18 |
| December 2025 | 75 | 59.5° / 45.5° | 5.4h | 6d | 3.1" | 12 |
| January 2026 | 82 | 62.4° / 44.6° | 6.5h | 2d | 3.28" | 22 |
| February 2026 | 81 | 64.8° / 47.2° | 6.6h | 3d | 3.47" | 20 |
| March 2026 | 95 | 77.4° / 51.9° | 9.6h | 0d | 0" | 30 |
| April 2026 | 90 | 69.7° / 50.1° | 8.9h | 0d | 2.54" | 25 |
| May 2026 | 93 | 74.2° / 53° | 11.5h | 2d | 0.21" | 31 |
| June 2026 | 94 | 79.7° / 56.5° | 12.1h | 1d | 0.01" | 29 |
| July 2026 | 93 | 81.8° / 57.8° | 11.7h | 0d | 0" | 30 |
| August 2026 | 93 | 80.9° / 58.7° | 10.8h | 5d | 0" | 31 |
| September 2026 | 94 | 80.5° / 56.5° | 10.1h | 0d | 0.02" | 28 |
| October 2026 | 91 | 77.2° / 53.8° | 8.2h | 4d | 0.07" | 29 |
Climate Trends
Average Temperature by Month
About the Los Altos Hills climate charts
The temperature chart compares average monthly highs and lows at Los Altos Hills, 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 Los Altos Hills. 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 Los Altos Hills, the warmest typical hour is 3 PM in August (82°F). The coldest is 7 AM in December (46°F).
- Fog: Fog or low cloud covers Los Altos Hills in 29% of 8 AM hours in July, the foggiest month. It usually thins to a third of that by 10 AM. April mornings are the least foggy (6%).
- Wind: From March through October, wind at Los Altos Hills typically builds after 1 PM. In May it peaks around 5 PM, averaging 11 mph with 6% of those hours windy, while mornings average 4 mph.
- Cloud Cover: June middays are the clearest at Los Altos Hills (13% average cloud cover), and December middays are the cloudiest (32%).
- Solar Radiation: The strongest typical sun at Los Altos Hills comes at 1 PM in June, averaging 981 W/m².
How to read the hourly heatmaps for Los Altos Hills
This heatmap shows how average temperature at Los Altos Hills 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 Los Altos Hills. 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 Los Altos Hills 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 Los Altos Hills 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 Los Altos Hills 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.
How recent months compared at Los Altos Hills
- October 2026 recap: October 2026 at Los Altos Hills averaged a high of 77°F, 2°F warmer than the 1991-2020 normal of 75°F. It brought 0.07 in. of rain, compared with a normal of 0.86 in.
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 16.3 in. of rain to Los Altos Hills, 78% of the 20.9 in. normal.
Location Details
Los Altos Hills weather questions
Everything you need to know about weather and visiting Los Altos Hills
What is the weather like at Los Altos Hills today?
It's 53°F at Los Altos Hills right now, with a comfort score of 76 (great). Monday's forecast high at Los Altos Hills is 56°F, 10°F below the mid November normal of 66°F. The best window today is 10 AM to 1 PM, at about 54°F with a 3 mph wind (comfort 60).
What is the best month to visit Los Altos Hills?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Los Altos Hills are June, September, and July. The best hours are usually 10 AM to 1 PM in June, 10 AM to 1 PM in September, and 10 AM to 1 PM in July. The warm season lasts about 3.1 months, from Jun 26 to Sep 28, when the average high is 78°F or warmer. Highs peak around Aug 8 at about 80°F.
What are the warmest and coldest months at Los Altos Hills?
August is the warmest month at Los Altos Hills, 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 Los Altos Hills?
Fog or low cloud covers Los Altos Hills in 29% of 8 AM hours in July, the foggiest month. It usually thins to a third of that by 10 AM. April mornings are the least foggy (6%).
When is it windiest at Los Altos Hills?
From March through October, wind at Los Altos Hills typically builds after 1 PM. In May it peaks around 5 PM, averaging 11 mph with 6% of those hours windy, while mornings average 4 mph.
How much rain does Los Altos Hills get?
January is the wettest month (4.1 in.), out of about 20.9 in. a year. The rainy season runs from Nov 16 to Apr 2, when a day has at least a 20% chance of measurable rain. That stretch brings 80% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 16.3 in. of rain to Los Altos Hills, 78% of the 20.9 in. normal.
How does Los Altos Hills weather compare with Monte Bello Open Space Preserve?
Monte Bello Open Space Preserve sits 1,802 ft higher, 4 miles away. Its summer highs average 6°F cooler and its winter lows 1°F colder than Los Altos Hills.
What kind of place is Los Altos Hills?
Los Altos Hills is a rural-zoned town of large hillside lots climbing from Foothill Expressway toward Monte Bello Ridge, with no downtown and narrow two-lane roads. Much of its open space is privately owned. Residents get around on a town pathway network linking neighborhoods to Midpeninsula open space preserves, Rancho San Antonio and Arastradero. Byrne Preserve along upper Altamont Road and the town-run Westwind Community Barn keep its horse-country character. Hidden Villa's farm and trails sit in the Moody Road canyon at the town's western edge.
What is Los Altos Hills weather like in November?
November at Los Altos Hills averages a high of 66°F and a low of 44°F, with 2.1 in. of rain over about 6 rainy days. Afternoon wind averages 5 mph.
More about Los Altos Hills weather
Guides that explain the weather here and nearby
Data sources and methods
- Monthly temperatures and precipitation: NOAA 1991-2020 normals.
- Fog, cloud, wind, sun, and comfort by hour and month: NOAA's HRRR hourly analysis from September 2014 to April 2026.
- Daily records and recent months: NOAA URMA and HRRR analyses, plus NOAA Stage IV precipitation.
- Nearby comparisons and regional rankings use the same hourly HRRR summaries for every destination in the region.
- Alerts: National Weather Service. Tides and ocean temperature: NOAA CO-OPS, where shown.
- All statements on this page are computed from these datasets, apart from the “What shapes the weather” guide, which cites its sources inline.
- Town of Los Altos Hills, Pathway System (accessed 2026-10-27)
- Town of Los Altos Hills, Public Safety Power Shutoff (accessed 2026-10-27)
- Town of Los Altos Hills, Wildfire (accessed 2026-10-27)
- Town of Los Altos Hills, Westwind Community Barn (accessed 2026-10-27)
- Town of Los Altos Hills, Winter Storm Preparedness: Preparing for 2026 El Niño Season (accessed 2026-10-27)
- Hidden Villa, Visit (accessed 2026-10-27)
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