Sebastopol Weather
Town • San Francisco Bay Area
Sebastopol sits about 7 miles west of downtown Santa Rosa on Highway 12. Here west county's orchards and vineyards drop to the Laguna de Santa Rosa, the county's largest freshwater wetland. The town was built on apples, and the Gravenstein Apple Fair still celebrates its heirloom variety. The Barlow, a former apple-packing plant, is now an open-air marketplace. The recycled-object sculptures along Florence Avenue and an Antique Row on Main Street give the compact downtown its arts-town character.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Sebastopol weather today and through the year
It's 53°F at Sebastopol right now (feels like 51°F), with 4 mph wind and a comfort score of 76. Today's forecast high at Sebastopol is 58°F, 7°F below the mid November normal of 65°F. No fog in the forecast for today at Sebastopol. In November, 29% of morning hours here are foggy on average. The best window today is 2 PM to 5 PM, at about 50°F with a 2 mph wind (comfort 57).
August is the warmest month at Sebastopol, with an average high of 81°F. December is the coldest, with an average low of 38°F. December is the wettest month (7.0 in.), out of about 33.5 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Sebastopol are September, July, and August. The best hours are usually 10 AM to 1 PM in September, 10 AM to 1 PM in July, and 10 AM to 1 PM in August.
Sebastopol is one of the first inland towns the summer fog reaches. Cool marine air moves in from the Pacific along the valleys of the Russian River and its tributaries. The hills west of town toward Occidental are low enough to let it spill over. Federal winegrowing records describe the farmland west, south, and east of Sebastopol as heavy-fog country, and summer mornings here are often 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 Sebastopol in the next few days
No active National Weather Service alerts for this location.
Fog
No fog in the forecast for today at Sebastopol. In November, 29% of morning hours here are foggy on average.
Best time to go
The best window today is 2 PM to 5 PM, at about 50°F with a 2 mph wind (comfort 57).
Best day this week
Of the next 7 days, Friday looks best for Sebastopol, with a 60°F high and midday comfort near 72. Today looks weakest (50).
Rain
Next good chance of rain: today (87%, about 0.58 in.).
Live weather map
Weather around Sebastopol right now
Overcast and 53° at Sebastopol right now.
About the live weather map for Sebastopol
The map centers on Sebastopol 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.
Sebastopol vs nearby places
Typical summer conditions compared with Sebastopol, 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 Sebastopol |
|---|---|---|---|---|---|
| Graton | 3.4 mi | +2°F | 29% | 9 mph | a very similar climate |
| Forestville | 6.1 mi | +3°F | 30% | 8 mph | a very similar climate |
| Santa Rosa | 6.5 mi | +2°F | 33% | 9 mph | a very similar climate |
| Dillon Beach | 13.2 mi | -25°F | 43% | 12 mph | about 25°F cooler on summer afternoons and more summer morning fog (43% vs 30% of morning hours) |
| Salmon Creek Beach | 13.7 mi | -25°F | 49% | 11 mph | about 25°F cooler on summer afternoons and more summer morning fog (49% vs 30% of morning hours) |
| Schoolhouse Beach | 13.9 mi | -25°F | 51% | 9 mph | about 25°F cooler on summer afternoons and about 58% more rain a year |
Places with a climate like Sebastopol's
- Petaluma (16 mi away): nearly the same temperatures every month
- Portola Redwoods State Park (86 mi away): similar temperatures through the year
- Jack London State Historic Park (16 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Sebastopol climate comparisons mean
These cards compare recent conditions at Sebastopol 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 Sebastopol 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.
Sebastopol weather by month
August is the warmest month at Sebastopol, with an average high of 81°F. December is the coldest, with an average low of 38°F. December is the wettest month (7.0 in.), out of about 33.5 in. a year. Morning fog peaks in December, when fog or low cloud covers 40% of the hours from 6 to 10 AM. June has the clearest middays, with clouds covering about 12% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Sebastopol are September, July, and August. The best hours are usually 10 AM to 1 PM in September, 10 AM to 1 PM in July, and 10 AM to 1 PM in August.
| Month | Avg high | Avg low | Rain | Rainy days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 58°F | 39°F | 6.5 in | 11 | 39% | 37% | 5 mph | 9.8 h | 40 |
| Feb | 62°F | 41°F | 6.5 in | 11 | 24% | 29% | 7 mph | 10.7 h | 48 |
| Mar | 65°F | 42°F | 4.5 in | 9 | 26% | 33% | 8 mph | 11.9 h | 64 |
| Apr | 68°F | 43°F | 2.2 in | 6 | 20% | 27% | 9 mph | 13.2 h | 68 |
| May | 73°F | 47°F | 1.1 in | 4 | 19% | 24% | 10 mph | 14.3 h | 79 |
| Jun | 78°F | 49°F | 0.3 in | 2 | 20% | 12% | 11 mph | 14.8 h | 82 |
| Jul | 80°F | 51°F | 0.0 in | 0 | 36% | 12% | 10 mph | 14.6 h | 83 |
| Aug | 81°F | 51°F | 0.0 in | 1 | 34% | 13% | 10 mph | 13.6 h | 83 |
| Sep | 81°F | 50°F | 0.1 in | 2 | 30% | 15% | 9 mph | 12.3 h | 86 |
| Oct | 76°F | 47°F | 1.6 in | 5 | 28% | 20% | 8 mph | 11.1 h | 80 |
| Nov | 65°F | 42°F | 3.6 in | 8 | 29% | 24% | 6 mph | 10.0 h | 68 |
| Dec | 58°F | 38°F | 7.0 in | 11 | 40% | 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 Sebastopol's weather different
When the fog burns off
1 PMwhen December fog usually thins (46% foggy at 5 AM)
Fog or low cloud covers Sebastopol in 46% of 5 AM hours in December, the foggiest month. It usually thins to a third of that by 1 PM. May mornings are the least foggy (19%).
When the wind picks up
1 PMwhen afternoon wind builds, February–November
From February through November, wind at Sebastopol typically builds after 1 PM. In June it peaks around 4 PM, averaging 12 mph with 13% of those hours windy, while mornings average 3 mph.
Daylight
9.5–14.8 hof daylight, Dec to Jun
Days at Sebastopol 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 Sebastopol
- Warm seasonJul 2 – Sep 28 · highs 79°F+
The warm season lasts about 2.9 months, from Jul 2 to Sep 28, when the average high is 79°F or warmer. Highs peak around Aug 8 at about 81°F.
- Cool seasonNov 28 – Feb 28 · highs 63°F or lower
The cool season runs from Nov 28 to Feb 28, when the average high is 63°F or lower. The coldest nights come around Dec 8, with an average low near 38°F.
- Rainy seasonOct 27 – Apr 19 · 89% of the year's rain
The rainy season runs from Oct 27 to Apr 19, 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 20 and half of its annual total by Jan 22.
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, Sebastopol averaged 16 days a year at 90°F or hotter and 4 nights a year at or below freezing. It averaged 22 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 156 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Oct 3, 2026 (100°F) and the coldest night was Feb 11, 2025 (30°F). The wettest day was Nov 21, 2024 (6.39 in.), and the strongest 2 PM gust was 49 mph on Mar 12, 2025.
- 16days at 90°F or hotter
- 4nights at or below freezing
- 22days with ½ in. of rain or more
- 1afternoon with 20+ mph wind
- 156mornings with 3+ hours of fog or low cloud
- Hottest day100°FOct 3, 2026
- Coldest night30°FFeb 11, 2025
- Wettest day6.39 inNov 21, 2024
- Strongest 2 PM gust49 mphMar 12, 2025
What shapes Sebastopol's weather
Summer fog in Sebastopol usually rolls in during the evening and pulls back by late morning. That gives the town a wide daily swing, with cool, damp nights and warm, often sunny afternoons. That rhythm is the cool-climate pattern that defines the Green Valley and Russian River Valley grape-growing districts surrounding town.
Much of Sebastopol sits low. The Laguna de Santa Rosa, just east of downtown, collects runoff from much of the Santa Rosa Plain. On clear, still winter nights cold air sinks into those bottomlands. In wet winters the wetland floods and closes low trails in nearby parks, while the orchard ridges west of town stay drier.
Tips for visiting Sebastopol
Save outdoor plans for the afternoon
Summer fog from the coast often arrives in the evening and lingers into the morning, so afternoons are the most reliable time for sun.
Ride the Joe Rodota Trail
This paved 8.5-mile trail links Sebastopol to downtown Santa Rosa, with Laguna and farmland views along the rural stretch. Leashed dogs are allowed.
Expect flooded back trails in winter
Ragle Ranch's backcountry trails cross wetlands along Atascadero Creek and close seasonally for flooding. The paved east-side loop is the wet-weather option.
Come in late summer for apples
Late summer is apple and harvest season, and the Gravenstein Apple Fair celebrates the town's own heirloom apples.
Bird the Laguna after winter rain
Winter rains turn the Laguna into a flooded marsh. The Kelly Pond overlook on the Laguna de Santa Rosa Trail is a good bird-watching stop.
Sebastopol through the seasons
- Spring (March–May)
- Orchards bloom and the hills stay green. May has the fewest foggy mornings of the year, and the summer fog pattern builds again in June and July.
- Summer (June–August)
- Summer brings gray mornings and warm afternoons. Coastal fog moving inland through the Russian River and its tributary valleys often blankets the farmland around town overnight.
- Fall (September–November)
- Fall is apple and grape harvest season. The fog backs off a little, and September afternoons are as warm as August's until the first storms arrive.
- Winter (December–February)
- Winter is wet and green, and foggy mornings peak in December. The Laguna de Santa Rosa, dry in summer and fall, floods into a marshy landscape.
Activities and the weather that matters
- Cycling or walking the Joe Rodota Trail: Dry afternoons after the fog lifts are best. Winter rain and fog make the open Laguna stretch damp and cold.
- Birding the Laguna de Santa Rosa: Birding is most rewarding in winter, when rain floods the wetland. In summer and fall the Laguna is dry.
- Apple farms and the Gravenstein Apple Fair: Apple season makes a late-summer outing, best on a fog-free afternoon.
Official sources and current conditions
- Sonoma County Regional Parks: Ragle Ranch Regional Park
- Sonoma County Regional Parks: Joe Rodota Trail
- Sonoma County Regional Parks: Laguna de Santa Rosa Trail
- Sonoma County emergency alerts (SoCoAlert)
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 | 75 | 62.3° / 41.5° | 6h | 10d | 14.97" | 15 |
| December 2024 | 67 | 58.9° / 43° | 5.1h | 11d | 10.11" | 10 |
| January 2025 | 81 | 60.1° / 38.5° | 6.9h | 9d | 0.51" | 19 |
| February 2025 | 72 | 60.3° / 40.9° | 5.9h | 9d | 11.3" | 14 |
| March 2025 | 78 | 60.6° / 42.6° | 7.5h | 7d | 3.85" | 18 |
| April 2025 | 88 | 65° / 44.5° | 9.7h | 7d | 0.53" | 26 |
| May 2025 | 95 | 74.6° / 47.4° | 12.1h | 3d | 0.09" | 31 |
| June 2025 | 92 | 74.9° / 48.6° | 12.2h | 8d | 0" | 30 |
| July 2025 | 92 | 73.7° / 51.7° | 11.6h | 12d | 0" | 31 |
| August 2025 | 91 | 82.3° / 51.8° | 11.1h | 10d | 0" | 31 |
| September 2025 | 90 | 78.5° / 54.7° | 9.3h | 7d | 0.03" | 28 |
| October 2025 | 84 | 71.8° / 49.8° | 7.1h | 11d | 1.23" | 22 |
| November 2025 | 76 | 63.8° / 47.7° | 5.9h | 14d | 4.99" | 13 |
| December 2025 | 62 | 55.6° / 42.9° | 4.4h | 25d | 6.36" | 3 |
| January 2026 | 78 | 60.5° / 40.8° | 6.7h | 10d | 5.58" | 20 |
| February 2026 | 77 | 62.3° / 43.8° | 6.3h | 7d | 5.02" | 15 |
| March 2026 | 95 | 75.9° / 46.4° | 9.7h | 4d | 0.06" | 30 |
| April 2026 | 86 | 65.9° / 45.7° | 9.5h | 5d | 4.95" | 23 |
| May 2026 | 92 | 71.1° / 50.1° | 11.5h | 6d | 0.67" | 29 |
| June 2026 | 94 | 75.9° / 52.1° | 12h | 7d | 0" | 30 |
| July 2026 | 92 | 79.9° / 51.5° | 11.4h | 8d | 0.04" | 31 |
| August 2026 | 92 | 78.7° / 52.8° | 10.4h | 14d | 0" | 31 |
| September 2026 | 91 | 78.8° / 51.8° | 9.5h | 10d | 0.28" | 29 |
| October 2026 | 90 | 77.7° / 46.1° | 8.6h | 4d | 0.16" | 29 |
Climate Trends
Average Temperature by Month
About the Sebastopol climate charts
The temperature chart compares average monthly highs and lows at Sebastopol, 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 Sebastopol. 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 Sebastopol, the warmest typical hour is 3 PM in August (81°F). The coldest is 7 AM in February (42°F).
- Fog: Fog or low cloud covers Sebastopol in 46% of 5 AM hours in December, the foggiest month. It usually thins to a third of that by 1 PM. May mornings are the least foggy (19%).
- Wind: From February through November, wind at Sebastopol typically builds after 1 PM. In June it peaks around 4 PM, averaging 12 mph with 13% of those hours windy, while mornings average 3 mph.
- Cloud Cover: June middays are the clearest at Sebastopol (12% average cloud cover), and December middays are the cloudiest (42%).
- Solar Radiation: The strongest typical sun at Sebastopol comes at 1 PM in June, averaging 976 W/m².
How to read the hourly heatmaps for Sebastopol
This heatmap shows how average temperature at Sebastopol 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 Sebastopol. 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 Sebastopol 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 Sebastopol 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 Sebastopol 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 Sebastopol
- October 2026 recap: October 2026 at Sebastopol averaged a high of 78°F, 6°F warmer than October 2025 (72°F).
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 29.2 in. of rain to Sebastopol, 87% of the 33.5 in. normal.
Location Details
Sebastopol weather questions
Everything you need to know about weather and visiting Sebastopol
What is the weather like at Sebastopol today?
It's 53°F at Sebastopol right now, with a comfort score of 76 (great). Today's forecast high at Sebastopol is 58°F, 7°F below the mid November normal of 65°F. The best window today is 2 PM to 5 PM, at about 50°F with a 2 mph wind (comfort 57).
What is the best month to visit Sebastopol?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Sebastopol are September, July, and August. The best hours are usually 10 AM to 1 PM in September, 10 AM to 1 PM in July, and 10 AM to 1 PM in August. The warm season lasts about 2.9 months, from Jul 2 to Sep 28, when the average high is 79°F or warmer. Highs peak around Aug 8 at about 81°F.
What are the warmest and coldest months at Sebastopol?
August is the warmest month at Sebastopol, with an average high of 81°F. December is the coldest, with an average low of 38°F.
When does the fog burn off at Sebastopol?
Fog or low cloud covers Sebastopol in 46% of 5 AM hours in December, the foggiest month. It usually thins to a third of that by 1 PM. May mornings are the least foggy (19%).
When is it windiest at Sebastopol?
From February through November, wind at Sebastopol typically builds after 1 PM. In June it peaks around 4 PM, averaging 12 mph with 13% of those hours windy, while mornings average 3 mph.
How much rain does Sebastopol get?
December is the wettest month (7.0 in.), out of about 33.5 in. a year. The rainy season runs from Oct 27 to Apr 19, 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 29.2 in. of rain to Sebastopol, 87% of the 33.5 in. normal.
What kind of place is Sebastopol?
Sebastopol sits about 7 miles west of downtown Santa Rosa on Highway 12. Here west county's orchards and vineyards drop to the Laguna de Santa Rosa, the county's largest freshwater wetland. The town was built on apples, and the Gravenstein Apple Fair still celebrates its heirloom variety. The Barlow, a former apple-packing plant, is now an open-air marketplace. The recycled-object sculptures along Florence Avenue and an Antique Row on Main Street give the compact downtown its arts-town character.
What is Sebastopol weather like in November?
November at Sebastopol averages a high of 65°F and a low of 42°F, with 3.6 in. of rain over about 8 rainy days. About 29% of morning hours are foggy. Afternoon wind averages 6 mph.
More about Sebastopol 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 Winegrowers, About Sonoma County Terroir (PDF) (accessed 2026-10-27)
- TTB proposed expansion of the Russian River Valley viticultural area, Federal Register, Jan. 31, 2005 (accessed 2026-10-27)
- Sonoma County Regional Parks, Joe Rodota Trail (accessed 2026-10-27)
- Sonoma County Regional Parks, Ragle Ranch Regional Park (accessed 2026-10-27)
- Sonoma County Tourism, Sebastopol (accessed 2026-10-27)
- Sonoma County Regional Parks, Laguna de Santa Rosa Trail (accessed 2026-10-27)
Rendered 2026-11-15T12:16:23.284Z.