Willow Glen Weather
Town • San Francisco Bay Area
Willow Glen is an older residential neighborhood of tree-lined streets and historic homes, a few miles southwest of downtown San Jose. It sits between Los Gatos Creek and the Guadalupe River. Its main street, Lincoln Avenue, runs as a small downtown of its own with more than 250 businesses, from delis to cocktail bars. Where downtown is high-rise and paved, Willow Glen is low, shaded, and laced with creek corridors, and that changes how it feels on a hot day.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Willow Glen weather today and through the year
It's 53°F at Willow Glen right now (feels like 50°F), with 5 mph wind and a comfort score of 77. Monday's forecast high at Willow Glen is 56°F, 11°F below the mid November normal of 67°F. The best window today is 11 AM to 2 PM, at about 54°F with a 3 mph wind (comfort 60).
August is the warmest month at Willow Glen, with an average high of 84°F. December is the coldest, with an average low of 40°F. February is the wettest month (3.1 in.), out of about 16.1 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Willow Glen are June, September, and July. The best hours are usually 9 AM to noon in June, 10 AM to 1 PM in September, and 9 AM to noon in July.
Willow Glen shares downtown's air mass but not its surfaces. Mature street trees shade sidewalks and roofs, and low houses with yards release heat quickly after sunset. As a result, summer evenings cool off faster here than in the high-rise core a couple of miles northeast. On a hot afternoon a walk down a shaded side street feels noticeably milder than the open pavement downtown.
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 Willow Glen in the next few days
No active National Weather Service alerts for this location.
Best time to go
The best window today is 11 AM to 2 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 Willow Glen, with a 61°F high and midday comfort near 74. Wednesday looks weakest (50).
Rain
Next good chance of rain: today (88%, about 0.25 in.).
Live weather map
Weather around Willow Glen right now
Overcast and 53° at Willow Glen right now.
About the live weather map for Willow Glen
The map centers on Willow Glen 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.
Willow Glen vs nearby places
Typical summer conditions compared with Willow Glen, 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 Willow Glen |
|---|---|---|---|---|---|
| Downtown San Jose | 2.2 mi | same | 8% | 10 mph | a very similar climate |
| Campbell | 3.5 mi | +1°F | 8% | 9 mph | a very similar climate |
| Santa Clara | 4.8 mi | -3°F | 11% | 10 mph | a very similar climate |
| Don Edwards Wildlife Refuge | 16.8 mi | -20°F | 18% | 16 mph | about 20°F cooler on summer afternoons and windier summer afternoons (16 vs 10 mph) |
| Coyote Hills Regional Park | 20.3 mi | -20°F | 21% | 14 mph | about 20°F cooler on summer afternoons and windier summer afternoons (14 vs 10 mph) |
| Bonny Doon | 23.1 mi | -12°F | 56% | 8 mph | about twice as much rain a year and more summer morning fog (56% vs 9% of morning hours) |
Places with a climate like Willow Glen's
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Willow Glen climate comparisons mean
These cards compare recent conditions at Willow Glen 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 Willow Glen 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.
Willow Glen weather by month
August is the warmest month at Willow Glen, with an average high of 84°F. December is the coldest, with an average low of 40°F. February is the wettest month (3.1 in.), out of about 16.1 in. a year. Morning fog peaks in December, when fog or low cloud covers 17% of the hours from 6 to 10 AM. July has the clearest middays, with clouds covering about 5% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Willow Glen are June, September, and July. The best hours are usually 9 AM to noon in June, 10 AM to 1 PM in September, and 9 AM to noon in July.
| Month | Avg high | Avg low | Rain | Rainy days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 60°F | 40°F | 3.1 in | 7 | 13% | 29% | 5 mph | 9.9 h | 62 |
| Feb | 63°F | 42°F | 3.1 in | 7 | 10% | 24% | 7 mph | 10.8 h | 66 |
| Mar | 67°F | 44°F | 2.7 in | 7 | 8% | 29% | 8 mph | 11.9 h | 69 |
| Apr | 71°F | 46°F | 1.2 in | 5 | 6% | 22% | 9 mph | 13.1 h | 80 |
| May | 76°F | 50°F | 0.5 in | 3 | 6% | 17% | 9 mph | 14.2 h | 83 |
| Jun | 82°F | 53°F | 0.1 in | 2 | 7% | 7% | 10 mph | 14.7 h | 88 |
| Jul | 84°F | 56°F | 0.0 in | 0 | 11% | 5% | 10 mph | 14.5 h | 86 |
| Aug | 84°F | 56°F | 0.0 in | 1 | 10% | 6% | 9 mph | 13.5 h | 86 |
| Sep | 83°F | 54°F | 0.1 in | 1 | 6% | 10% | 8 mph | 12.3 h | 88 |
| Oct | 77°F | 49°F | 0.7 in | 3 | 10% | 13% | 7 mph | 11.1 h | 85 |
| Nov | 67°F | 43°F | 1.6 in | 5 | 11% | 19% | 6 mph | 10.1 h | 79 |
| Dec | 59°F | 40°F | 2.9 in | 7 | 17% | 31% | 5 mph | 9.6 h | 61 |
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 Willow Glen's weather different
When the fog burns off
noonwhen December fog usually thins (19% foggy at 8 AM)
Fog or low cloud covers Willow Glen in 19% of 8 AM hours in December, the foggiest month. It usually thins to a third of that by noon. April mornings are the least foggy (6%).
When the wind picks up
2 PMwhen afternoon wind builds, February–October
From February through October, wind at Willow Glen typically builds after 2 PM. In June it peaks around 5 PM, averaging 11 mph with 3% of those hours windy, while mornings average 3 mph.
Daylight
9.6–14.7 hof daylight, Dec to Jun
Days at Willow Glen range from about 9.6 hours in December to 14.7 hours in June. In mid-June the sun sets around 8:29 PM, and in mid-December around 4:56 PM.
Seasons at Willow Glen
- Warm seasonJun 25 – Sep 25 · highs 82°F+
The warm season lasts about 3.1 months, from Jun 25 to Sep 25, when the average high is 82°F or warmer. Highs peak around Aug 8 at about 84°F.
- Cool seasonNov 27 – Feb 27 · highs 65°F or lower
The cool season runs from Nov 27 to Feb 27, when the average high is 65°F or lower. The coldest nights come around Dec 8, with an average low near 40°F.
- Rainy seasonDec 1 – Mar 24 · 70% of the year's rain
The rainy season runs from Dec 1 to Mar 24, when a day has at least a 20% chance of measurable rain. That stretch brings 70% 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 6 and half of its annual total by Jan 29.
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, Willow Glen averaged 22 days a year at 90°F or hotter and 7 nights a year at or below freezing. It averaged 11 days a year with at least half an inch of rain and 0 afternoons with wind of 20 mph or more at 2 PM. About 46 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Jun 11, 2026 (100°F) and the coldest night was Jan 27, 2025 (28°F). The wettest day was Feb 5, 2025 (1.49 in.), and the strongest 2 PM gust was 35 mph on Feb 4, 2025.
- 22days at 90°F or hotter
- 7nights at or below freezing
- 11days with ½ in. of rain or more
- 0afternoons with 20+ mph wind
- 46mornings with 3+ hours of fog or low cloud
- Hottest day100°FJun 11, 2026
- Coldest night28°FJan 27, 2025
- Wettest day1.49 inFeb 5, 2025
- Strongest 2 PM gust35 mphFeb 4, 2025
What shapes Willow Glen's weather
Willow Glen's open yards lose heat fast on clear, still winter nights too. Cold air settles into the low ground along the Guadalupe River and Los Gatos Creek, and lawns and parked cars can frost over. Calm nights also trap fireplace smoke under the trees.
Like the rest of the valley floor, Willow Glen sits in the partial rain shadow of the Santa Cruz Mountains. A rain shadow is the drier zone on the far side of a range from incoming storms. It gets less rain than Los Gatos or Saratoga. Its flood risk comes from the river instead. Heavy storms upstream raise the Guadalupe quickly, and flooding in 1995 damaged homes here and in nearby neighborhoods.
Tips for visiting Willow Glen
Make Lincoln Avenue the destination
San Jose's visitor bureau counts more than 250 businesses along Lincoln Avenue, many locally owned, with a wide spread of restaurants.
Walk the shaded side streets
On hot afternoons the tree-lined residential streets off Lincoln Avenue are the coolest way to explore the neighborhood on foot.
Stay off the river trails in heavy storms
The Guadalupe River rises quickly when storms hit the hills upstream. In 1995 it flooded and damaged more than 150 homes in Willow Glen and nearby districts.
Skip the fireplace on alert days
Burning wood is illegal on winter Spare the Air alert days, and wood smoke is the top winter pollutant.
Willow Glen through the seasons
- Spring (March–May)
- Spring brings new leaves on the street trees and mild days, and the rain tapers off after March. It is a good season for long neighborhood walks.
- Summer (June–August)
- Summer is warm and sunny. The street canopy takes the edge off afternoons, and evenings cool faster than downtown's.
- Fall (September–October)
- September stays nearly as warm as August, and hot spells come when the bay breeze fails.
- Winter (November–February)
- Winter is the rainy season, and clear nights can bring frost to lawns and low ground. Calm nights also hold wood smoke under the trees.
Activities and the weather that matters
- Dining and shopping on Lincoln Avenue: Most evenings from late spring through early fall are warm enough for patio dining. Winter evenings turn cold quickly after sunset.
- Neighborhood walks: The street trees make walks comfortable nearly all year. On frosty winter mornings, wait for the sun.
- Biking the creek trails: The Los Gatos Creek and Guadalupe River corridors are flat and best in the morning. Avoid them during and right after heavy storms.
Official sources and current conditions
- Visit San Jose: Willow Glen
- Valley Water: Upper Guadalupe River flood protection
- Bay Area Air District: Spare the Air alerts
- National Weather Service, San Francisco Bay Area forecast office
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 | 85 | 65.2° / 42.9° | 6.5h | 1d | 1.9" | 22 |
| December 2024 | 79 | 63.5° / 42.8° | 5.5h | 5d | 2.91" | 16 |
| January 2025 | 87 | 62.9° / 37.3° | 7.1h | 2d | 0.05" | 26 |
| February 2025 | 81 | 64.1° / 42.3° | 6.7h | 4d | 4.71" | 17 |
| March 2025 | 87 | 64.9° / 44.6° | 8.3h | 4d | 2.09" | 25 |
| April 2025 | 93 | 71.2° / 47.7° | 9.6h | 0d | 0.25" | 28 |
| May 2025 | 95 | 77.5° / 50.9° | 12h | 0d | 0.04" | 31 |
| June 2025 | 95 | 78.9° / 54.2° | 12.5h | 0d | 0" | 30 |
| July 2025 | 94 | 81.1° / 57.8° | 11.8h | 2d | 0" | 31 |
| August 2025 | 92 | 84.4° / 58.7° | 10.8h | 4d | 0" | 31 |
| September 2025 | 92 | 82.2° / 61.3° | 9.6h | 3d | 0.26" | 29 |
| October 2025 | 90 | 74.6° / 51.8° | 8.1h | 4d | 1.39" | 28 |
| November 2025 | 81 | 66.7° / 47.1° | 6.6h | 10d | 2.93" | 16 |
| December 2025 | 73 | 60.5° / 43.6° | 5h | 14d | 2.92" | 8 |
| January 2026 | 83 | 64.1° / 40.5° | 6.7h | 3d | 3.01" | 22 |
| February 2026 | 81 | 66.5° / 44.9° | 6.8h | 5d | 3.62" | 19 |
| March 2026 | 95 | 78.8° / 49° | 9.7h | 0d | 0" | 30 |
| April 2026 | 90 | 71.3° / 49.6° | 9h | 1d | 2.06" | 25 |
| May 2026 | 94 | 75.6° / 53° | 11.6h | 3d | 0.51" | 30 |
| June 2026 | 94 | 81.5° / 57° | 12.4h | 0d | 0" | 29 |
| July 2026 | 94 | 82.2° / 58.5° | 11.5h | 0d | 0.02" | 30 |
| August 2026 | 94 | 83.7° / 59.8° | 10.7h | 1d | 0" | 31 |
| September 2026 | 94 | 81.6° / 56.1° | 10h | 1d | 0.07" | 28 |
| October 2026 | 90 | 79.1° / 51.9° | 8.2h | 1d | 0.13" | 28 |
Climate Trends
Average Temperature by Month
About the Willow Glen climate charts
The temperature chart compares average monthly highs and lows at Willow Glen, 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 Willow Glen. 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 Willow Glen, the warmest typical hour is 3 PM in August (84°F). The coldest is 7 AM in December (44°F).
- Fog: Fog or low cloud covers Willow Glen in 19% of 8 AM hours in December, the foggiest month. It usually thins to a third of that by noon. April mornings are the least foggy (6%).
- Wind: From February through October, wind at Willow Glen typically builds after 2 PM. In June it peaks around 5 PM, averaging 11 mph with 3% of those hours windy, while mornings average 3 mph.
- Cloud Cover: July middays are the clearest at Willow Glen (5% average cloud cover), and December middays are the cloudiest (31%).
- Solar Radiation: The strongest typical sun at Willow Glen comes at 1 PM in July, averaging 987 W/m².
How to read the hourly heatmaps for Willow Glen
This heatmap shows how average temperature at Willow Glen 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 Willow Glen. 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 Willow Glen 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 Willow Glen 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 Willow Glen 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 Willow Glen
- October 2026 recap: October 2026 at Willow Glen averaged a high of 79°F, 2°F warmer than the 1991-2020 normal of 77°F. It brought 0.13 in. of rain, compared with a normal of 0.72 in.
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 16.5 in. of rain to Willow Glen, 103% of the 16.1 in. normal.
Location Details
Willow Glen weather questions
Everything you need to know about weather and visiting Willow Glen
What is the weather like at Willow Glen today?
It's 53°F at Willow Glen right now, with a comfort score of 77 (great). Monday's forecast high at Willow Glen is 56°F, 11°F below the mid November normal of 67°F. The best window today is 11 AM to 2 PM, at about 54°F with a 3 mph wind (comfort 60).
What is the best month to visit Willow Glen?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Willow Glen are June, September, and July. The best hours are usually 9 AM to noon in June, 10 AM to 1 PM in September, and 9 AM to noon in July. The warm season lasts about 3.1 months, from Jun 25 to Sep 25, when the average high is 82°F or warmer. Highs peak around Aug 8 at about 84°F.
What are the warmest and coldest months at Willow Glen?
August is the warmest month at Willow Glen, with an average high of 84°F. December is the coldest, with an average low of 40°F.
When does the fog burn off at Willow Glen?
Fog or low cloud covers Willow Glen in 19% of 8 AM hours in December, the foggiest month. It usually thins to a third of that by noon. April mornings are the least foggy (6%).
When is it windiest at Willow Glen?
From February through October, wind at Willow Glen typically builds after 2 PM. In June it peaks around 5 PM, averaging 11 mph with 3% of those hours windy, while mornings average 3 mph.
How much rain does Willow Glen get?
February is the wettest month (3.1 in.), out of about 16.1 in. a year. The rainy season runs from Dec 1 to Mar 24, when a day has at least a 20% chance of measurable rain. That stretch brings 70% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 16.5 in. of rain to Willow Glen, 103% of the 16.1 in. normal.
What kind of place is Willow Glen?
Willow Glen is an older residential neighborhood of tree-lined streets and historic homes, a few miles southwest of downtown San Jose. It sits between Los Gatos Creek and the Guadalupe River. Its main street, Lincoln Avenue, runs as a small downtown of its own with more than 250 businesses, from delis to cocktail bars. Where downtown is high-rise and paved, Willow Glen is low, shaded, and laced with creek corridors, and that changes how it feels on a hot day.
What is Willow Glen weather like in November?
November at Willow Glen averages a high of 67°F and a low of 43°F, with 1.6 in. of rain over about 5 rainy days. About 11% of morning hours are foggy. Afternoon wind averages 6 mph.
More about Willow Glen 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.
- Visit San Jose, Willow Glen (accessed 2026-10-27)
- Valley Water, E8: Upper Guadalupe River Flood Protection (accessed 2026-10-27)
- Bay Area Air District, Spare the Air (accessed 2026-10-27)
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