Windsor Weather
Town • San Francisco Bay Area
Windsor fills the northern end of the Santa Rosa Plain, the flat floor of central Sonoma County between Santa Rosa and Healdsburg. The town sits right where the valley meets the first oak-covered foothills of the Mayacamas Mountains. It is mostly a residential town built around a walkable Town Green that hosts more than 30 free events a year. The Russian River is a short drive west, and Sonoma County Regional Parks' Foothill Regional Park climbs the hills on the town's east side.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Windsor weather today and through the year
It's 53°F at Windsor right now (feels like 51°F), with 3 mph wind and a comfort score of 76. Today's forecast high at Windsor is 58°F, 8°F below the mid November normal of 66°F. No fog in the forecast for today at Windsor. In November, 29% of morning hours here are foggy on average. The best window today is 1 PM to 4 PM, at about 50°F with a 3 mph wind (comfort 56).
August is the warmest month at Windsor, with an average high of 85°F. December is the coldest, with an average low of 38°F. December is the wettest month (7.0 in.), out of about 34.5 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Windsor are September, May, and July. The best hours are usually 10 AM to 1 PM in September, 11 AM to 2 PM in May, and 10 AM to 1 PM in July.
Windsor's weather comes from sitting at the far end of a long, open plain. On summer evenings, ocean air pours through the Petaluma Gap and spreads north across the Santa Rosa Plain. A second stream of marine air works up the Russian River canyon from Jenner. The two meet over Windsor overnight, so summer mornings often start cool and gray before the cloud clears by midday.
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 Windsor in the next few days
No active National Weather Service alerts for this location.
Fog
No fog in the forecast for today at Windsor. In November, 29% of morning hours here are foggy on average.
Best time to go
The best window today is 1 PM to 4 PM, at about 50°F with a 3 mph wind (comfort 56).
Best day this week
Of the next 7 days, Friday looks best for Windsor, with a 60°F high and midday comfort near 72. Today looks weakest (50).
Rain
Next good chance of rain: today (89%, about 0.61 in.).
Live weather map
Weather around Windsor right now
Overcast and 53° at Windsor right now.
About the live weather map for Windsor
The map centers on Windsor 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.
Windsor vs nearby places
Typical summer conditions compared with Windsor, 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 Windsor |
|---|---|---|---|---|---|
| Healdsburg | 5.3 mi | +2°F | 25% | 9 mph | a very similar climate |
| Forestville | 6.5 mi | -2°F | 30% | 8 mph | a very similar climate |
| Graton | 8.1 mi | -3°F | 29% | 9 mph | a very similar climate |
| Schoolhouse Beach | 18.4 mi | -30°F | 51% | 9 mph | about 30°F cooler on summer afternoons and about 53% more rain a year |
| Salmon Creek Beach | 19.3 mi | -30°F | 49% | 11 mph | about 30°F cooler on summer afternoons and more summer morning fog (49% vs 30% of morning hours) |
| Dillon Beach | 22.3 mi | -30°F | 43% | 12 mph | about 30°F cooler on summer afternoons and more summer morning fog (43% vs 30% of morning hours) |
Places with a climate like Windsor's
- Jack London State Historic Park (20 mi away): nearly the same temperatures every month
- Kenwood (17 mi away): nearly the same temperatures every month
- Glen Ellen (20 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Windsor climate comparisons mean
These cards compare recent conditions at Windsor 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 Windsor 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.
Windsor weather by month
August is the warmest month at Windsor, with an average high of 85°F. December is the coldest, with an average low of 38°F. December is the wettest month (7.0 in.), out of about 34.5 in. a year. Morning fog peaks in January, when fog or low cloud covers 40% of the hours from 6 to 10 AM. July has the clearest middays, with clouds covering about 9% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Windsor are September, May, and July. The best hours are usually 10 AM to 1 PM in September, 11 AM to 2 PM in May, 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 | 59°F | 38°F | 6.9 in | 11 | 40% | 37% | 5 mph | 9.8 h | 40 |
| Feb | 62°F | 40°F | 6.5 in | 11 | 23% | 29% | 6 mph | 10.7 h | 49 |
| Mar | 66°F | 41°F | 4.9 in | 9 | 25% | 33% | 7 mph | 11.9 h | 54 |
| Apr | 70°F | 43°F | 2.3 in | 6 | 23% | 26% | 8 mph | 13.2 h | 70 |
| May | 76°F | 47°F | 1.3 in | 5 | 21% | 21% | 9 mph | 14.3 h | 81 |
| Jun | 82°F | 51°F | 0.3 in | 2 | 21% | 9% | 10 mph | 14.8 h | 79 |
| Jul | 85°F | 52°F | 0.0 in | 0 | 34% | 9% | 9 mph | 14.6 h | 81 |
| Aug | 85°F | 52°F | 0.0 in | 1 | 36% | 10% | 9 mph | 13.6 h | 81 |
| Sep | 84°F | 50°F | 0.1 in | 2 | 31% | 13% | 8 mph | 12.3 h | 84 |
| Oct | 77°F | 47°F | 1.7 in | 5 | 28% | 19% | 7 mph | 11.1 h | 80 |
| Nov | 66°F | 41°F | 3.6 in | 8 | 29% | 24% | 5 mph | 10.0 h | 69 |
| Dec | 58°F | 38°F | 7.0 in | 11 | 39% | 42% | 5 mph | 9.5 h | 36 |
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 Windsor's weather different
When the fog burns off
noonwhen January fog usually thins (49% foggy at 6 AM)
Fog or low cloud covers Windsor in 49% of 6 AM hours in January, the foggiest month. It usually thins to a third of that by noon. May mornings are the least foggy (21%).
When the wind picks up
1 PMwhen afternoon wind builds, February–October
From February through October, wind at Windsor typically builds after 1 PM. In June it peaks around 4 PM, averaging 11 mph with 9% of those hours windy, while mornings average 4 mph.
Hot hours
4 habove 85°F on a typical August afternoon
In August, the average temperature stays at or above 85°F for 4 hours a day.
Daylight
9.5–14.8 hof daylight, Dec to Jun
Days at Windsor range from about 9.5 hours in December to 14.8 hours in June. In mid-June the sun sets around 8:35 PM, and in mid-December around 4:56 PM.
Seasons at Windsor
- Warm seasonJun 29 – Sep 24 · highs 83°F+
The warm season lasts about 2.9 months, from Jun 29 to Sep 24, when the average high is 83°F or warmer. Highs peak around Aug 8 at about 85°F.
- Cool seasonNov 27 – Mar 1 · highs 64°F or lower
The cool season runs from Nov 27 to Mar 1, when the average high is 64°F or lower. The coldest nights come around Dec 8, with an average low near 38°F.
- Rainy seasonOct 27 – Apr 20 · 89% of the year's rain
The rainy season runs from Oct 27 to Apr 20, when a day has at least a 20% chance of measurable rain. That stretch brings 89% 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 19 and half of its annual total by Jan 23.
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, Windsor averaged 36 days a year at 90°F or hotter and 16 nights a year at or below freezing. It averaged 21 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 159 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Jun 11, 2026 (102°F) and the coldest night was Dec 10, 2024 (26°F). The wettest day was Nov 21, 2024 (6.96 in.), and the strongest 2 PM gust was 46 mph on Mar 12, 2025.
- 36days at 90°F or hotter
- 16nights at or below freezing
- 21days with ½ in. of rain or more
- 0afternoons with 20+ mph wind
- 159mornings with 3+ hours of fog or low cloud
- Hottest day102°FJun 11, 2026
- Coldest night26°FDec 10, 2024
- Wettest day6.96 inNov 21, 2024
- Strongest 2 PM gust46 mphMar 12, 2025
What shapes Windsor's weather
Once Windsor's morning cloud burns off, nothing shades the flat valley floor, and summer afternoons run hot. The hottest days come when the sea breeze weakens, which happens most often in late summer and early fall. The National Weather Service reads Windsor's current conditions from the Charles M. Schulz Sonoma County Airport station, just south of town on the same open plain.
The foothills on Windsor's east side are where fall wind matters. When dry northeast winds blow out of the interior, they pour down off the Mayacamas from The Geysers toward the Highway 101 corridor. In October 2019 the Kincade Fire, which started in The Geysers, pushed southwest on those winds and put Windsor under an evacuation order.
Clear, calm nights between winter storms let cold air settle on the open plain, so frosty mornings are common in winter even when the afternoons turn mild. Fog on those still winter mornings tends to be the ground-hugging valley kind rather than the summer marine layer.
Tips for visiting Windsor
Hike Foothill Regional Park early
The park on Arata Lane opens at 7 a.m. and has about 6.8 miles of trails through oak woodland and grassy hillsides. Start early in summer, before the hills heat up.
Check the wind before a park visit
Because of damage from the Kincade Fire, Foothill Regional Park may close during high wind advisories or storm conditions.
Expect fall power shutoffs
PG&E may shut off power anywhere in Sonoma County during Red Flag Warnings, strong winds, and low humidity, and outages can last several days.
Look up your evacuation zone
Find your Windsor address on the county's Know Your Zone map, and sign up for SoCoAlert and Nixle, which carry evacuation orders.
Bring a layer to the Town Green
Summer movies, concerts, and farmers markets on the Town Green start warm, but evenings cool off quickly once the sun drops.
Windsor through the seasons
- Spring (March–May)
- Wildflowers bloom on the hillsides of Foothill Regional Park while the valley floor is still green. Rain tapers off through April.
- Summer (June–August)
- Cool, sometimes gray mornings under a thin marine layer give way to hot, sunny afternoons. The evening sea breeze cools the plain quickly after sunset.
- Fall (September–November)
- September stays nearly as hot as August, and fall is the season for offshore wind, dry winds that blow from the interior toward the coast. The 2019 Kincade Fire evacuation came in late October.
- Winter (December–February)
- Winter is the rainy season. Between storms, clear nights bring frost to the valley floor, and Foothill Regional Park can close in storm conditions.
Activities and the weather that matters
- Hiking and pond fishing at Foothill Regional Park: Go on spring mornings when wildflowers are out. Summer afternoons are hot, and the park can close during high wind advisories.
- Town Green events: Summer evening concerts and movies are warm at the start and cool by dark, so bring a layer.
- Wine and beer tasting: Windsor's wineries, breweries, and tasting rooms make an easy indoor fallback on the hottest afternoons.
Official sources and current conditions
- Town of Windsor
- Sonoma County Regional Parks: Foothill Regional Park
- Sonoma County Emergency: Know Your Zone
- National Weather Service forecast: Windsor
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 | 77 | 63.2° / 40.9° | 6h | 11d | 14.93" | 17 |
| December 2024 | 68 | 60.2° / 41.4° | 5h | 13d | 9.36" | 11 |
| January 2025 | 83 | 62.8° / 36.7° | 7.1h | 9d | 0.47" | 20 |
| February 2025 | 73 | 62.7° / 40.4° | 5.6h | 11d | 10.92" | 13 |
| March 2025 | 80 | 63.5° / 42° | 7.2h | 9d | 3.67" | 19 |
| April 2025 | 88 | 69.3° / 45.1° | 9.5h | 12d | 0.5" | 24 |
| May 2025 | 93 | 79.8° / 48.7° | 12.2h | 5d | 0.09" | 31 |
| June 2025 | 92 | 79.8° / 50.1° | 12.1h | 12d | 0" | 30 |
| July 2025 | 91 | 79.8° / 53° | 11.5h | 10d | 0" | 31 |
| August 2025 | 88 | 88° / 53.5° | 11.1h | 10d | 0" | 28 |
| September 2025 | 88 | 82.6° / 55.8° | 9.3h | 6d | 0.22" | 26 |
| October 2025 | 84 | 73.4° / 49.8° | 7h | 11d | 1.25" | 22 |
| November 2025 | 76 | 64.4° / 46.8° | 5.9h | 16d | 4.64" | 14 |
| December 2025 | 61 | 55.5° / 41.1° | 4.2h | 24d | 5.29" | 4 |
| January 2026 | 78 | 62.2° / 38.6° | 6.2h | 9d | 5.61" | 20 |
| February 2026 | 77 | 64.3° / 43.1° | 6.3h | 6d | 4.52" | 14 |
| March 2026 | 94 | 80.6° / 46.6° | 9.8h | 2d | 0.06" | 31 |
| April 2026 | 87 | 69.8° / 45.8° | 9.2h | 6d | 4.18" | 22 |
| May 2026 | 92 | 75.6° / 51.5° | 11.6h | 7d | 0.96" | 30 |
| June 2026 | 91 | 80.8° / 53.6° | 12.2h | 9d | 0" | 28 |
| July 2026 | 90 | 84.5° / 52.4° | 11.6h | 6d | 0.02" | 31 |
| August 2026 | 88 | 84.3° / 54.2° | 10.5h | 15d | 0" | 30 |
| September 2026 | 89 | 82.6° / 51.9° | 9.7h | 9d | 0.24" | 27 |
| October 2026 | 88 | 80.3° / 46.1° | 8.5h | 2d | 0.24" | 27 |
Climate Trends
Average Temperature by Month
About the Windsor climate charts
The temperature chart compares average monthly highs and lows at Windsor, 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 Windsor. 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 Windsor, the warmest typical hour is 3 PM in August (87°F). The coldest is 7 AM in February (42°F).
- Fog: Fog or low cloud covers Windsor in 49% of 6 AM hours in January, the foggiest month. It usually thins to a third of that by noon. May mornings are the least foggy (21%).
- Wind: From February through October, wind at Windsor typically builds after 1 PM. In June it peaks around 4 PM, averaging 11 mph with 9% of those hours windy, while mornings average 4 mph.
- Cloud Cover: July middays are the clearest at Windsor (9% average cloud cover), and December middays are the cloudiest (42%).
- Solar Radiation: The strongest typical sun at Windsor comes at 1 PM in July, averaging 968 W/m².
How to read the hourly heatmaps for Windsor
This heatmap shows how average temperature at Windsor 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 Windsor. 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 Windsor 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 Windsor 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 Windsor 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 Windsor
- October 2026 recap: October 2026 at Windsor averaged a high of 80°F, 7°F warmer than October 2025 (73°F).
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 26.8 in. of rain to Windsor, 78% of the 34.5 in. normal.
Location Details
Windsor weather questions
Everything you need to know about weather and visiting Windsor
What is the weather like at Windsor today?
It's 53°F at Windsor right now, with a comfort score of 76 (great). Today's forecast high at Windsor is 58°F, 8°F below the mid November normal of 66°F. The best window today is 1 PM to 4 PM, at about 50°F with a 3 mph wind (comfort 56).
What is the best month to visit Windsor?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Windsor are September, May, and July. The best hours are usually 10 AM to 1 PM in September, 11 AM to 2 PM in May, and 10 AM to 1 PM in July. The warm season lasts about 2.9 months, from Jun 29 to Sep 24, when the average high is 83°F or warmer. Highs peak around Aug 8 at about 85°F.
What are the warmest and coldest months at Windsor?
August is the warmest month at Windsor, with an average high of 85°F. December is the coldest, with an average low of 38°F.
When does the fog burn off at Windsor?
Fog or low cloud covers Windsor in 49% of 6 AM hours in January, the foggiest month. It usually thins to a third of that by noon. May mornings are the least foggy (21%).
When is it windiest at Windsor?
From February through October, wind at Windsor typically builds after 1 PM. In June it peaks around 4 PM, averaging 11 mph with 9% of those hours windy, while mornings average 4 mph.
How much rain does Windsor get?
December is the wettest month (7.0 in.), out of about 34.5 in. a year. The rainy season runs from Oct 27 to Apr 20, when a day has at least a 20% chance of measurable rain. That stretch brings 89% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 26.8 in. of rain to Windsor, 78% of the 34.5 in. normal.
What kind of place is Windsor?
Windsor fills the northern end of the Santa Rosa Plain, the flat floor of central Sonoma County between Santa Rosa and Healdsburg. The town sits right where the valley meets the first oak-covered foothills of the Mayacamas Mountains. It is mostly a residential town built around a walkable Town Green that hosts more than 30 free events a year. The Russian River is a short drive west, and Sonoma County Regional Parks' Foothill Regional Park climbs the hills on the town's east side.
What is Windsor weather like in November?
November at Windsor averages a high of 66°F and a low of 41°F, with 3.6 in. of rain over about 8 rainy days. About 29% of morning hours are foggy. Afternoon wind averages 5 mph.
More about Windsor 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.
- Sonoma County Regional Parks, Foothill Regional Park (accessed 2026-10-27)
- Sonoma County Tourism, Windsor (accessed 2026-10-27)
- Sonoma County Emergency Management, Power Shutoffs (accessed 2026-10-27)
- Sonoma County Emergency Management (SoCoEmergency) (accessed 2026-10-27)
- Lake County News, Kincade fire update: Healdsburg and Windsor ordered to evacuate (Oct. 26, 2019) (accessed 2026-10-27)
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