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Cotati, CA 94931 Weather
Current conditions
Observed at Santa Rosa, Santa Rosa Sonoma County Airport · 40 min ago
Forecast
10-day-
Today
Sunny. High near 75, with temperatures falling to around 68 in the afternoon. Northwest wind 1 to 6 mph.
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Tonight
Areas of fog after 9pm. Mostly clear. Low around 41, with temperatures rising to around 43 overnight. West northwest wind around 2 mph.
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Sunday
Areas of fog before 10am. Mostly sunny. High near 72, with temperatures falling to around 66 in the afternoon. South southwest wind 0 to 5 mph.
National Weather Service forecast updated 4 hrs ago.
Hourly
Hourly forecast- Now49°
- 10 AM56°
- 11 AM62°
- 12 PM68°
- 1 PM71°
- 2 PM73°
- 3 PM74°
- 4 PM71°
- 5 PM68°
- 6 PM64°
- 7 PM56°
- 8 PM53°
- 9 PM51°
- 10 PM50°
- 11 PM49°
- Sun12 AM49°
- 1 AM48°
- 2 AM47°
- 3 AM45°
- 4 AM44°
- 5 AM43°
- 6 AM41°
- 7 AM42°
- 8 AM42°
Daily forecast
Details- TodayOct 24Sunny41°75°
- SunOct 25Areas Of Fog then Mostly Sunny41°72°
- MonOct 26Areas Of Fog then Mostly Sunny40°67°
- TueOct 27Areas Of Fog then Mostly Sunny41°67°
- WedOct 28Areas Of Fog then Partly Sunny12%42°66°
- ThuOct 29Areas Of Fog then Slight Chance Light Rain31%41°64°
- FriOct 30Areas Of Fog then Chance Light Rain31%41°64°
- SatOct 31Sunny41°61°
- SunNov 1Sunny40°62°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
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Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- SatGood (35)
- SunGood (37)
- MonGood (36)
Santa Rosa, CA reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyPetaluma Airport, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Santa Rosa 13 km
- Vallejo 46 km
- Fairfield 59 km
- Richmond 53 km
- Napa 37 km
- Petaluma 12 km
- San Rafael 42 km
- Novato 27 km
- Rohnert Park 2 km
- San Pablo 51 km
- Benicia 57 km
- Suisun 59 km
Forecasters' discussion
From the National Weather Service office in MTR, issued 4 hrs ago
Key Messages
Updated at 1038 PM PDT Fri Oct 23 2026
- Gusty offshore flow across the North Bay Interior Mountains subsides late this morning
- Near normal temperatures this weekend into the beginning of next week
- Coastal flooding due to astronomical high tides and thermal expansion this weekend through Thursday
Short Term
Issued at 1038 PM PDT Fri Oct 23 2026 (Today and tonight)
Gusty offshore flow across the North Bay Interior Mountains is ongoing tonight, with the windy and dry conditions dropping MinRH values in the 20s for some locations. Fire weather concerns would be higher for this area had we not received the recent wetting rainfall. The offshore flow regime should mostly limit fog development early this morning but still can't be ruled out entirely in some of the river valleys in Sonoma County.
Temperatures today will be around 5 degrees warmer than Friday and near normal for this time of year. The gusty winds across the North Bay will begin to ease by late this morning, with a beautiful day in store area wide across our CWA as upper level ridging builds overhead.
Long Term
Issued at 1038 PM PDT Fri Oct 23 2026 (Sunday through next Friday)
Sunday will almost be a carbon copy of today for the North Bay and Bay Area, with the Central Coast seeing temperatures warm another few degrees. Confidence and consensus in the synoptic pattern is poor after Monday. An upper trough shifts south to our latitude on Monday bringing a return of onshore flow, however the overall progressive pattern is struggling with the depth of the trough and how another system well offshore interacts with the flattening trough as it moves into the Great Basin. Despite the uncertainty in the overall pattern, any troughing or ridging will continue to be progressive and low amplitude, with no large temperature fluctuations or precipitation chances until the end of next week when the NBM seems to pick up on what the current ECMWF deterministic has depicted for next Friday into the weekend, troughing with increasing rain chances.
Aviation
(12Z TAFS) Issued at 419 AM PDT Sat Oct 24 2026
High pressure over the Great Basin strengthens overnight resulting in a push of offshore flow across the region. The influx of dry and warm air into the terminals allows for widespread VFR conditions to prevail through the TAF cycle. Winds remain light and variable through the early morning hours. By late Saturday morning, onshore winds prevail through sunset before becoming light and variable again.
Vicinity of SFO...VFR through the TAF period. Due to lack of cloud cover overnight, a bay breeze may develop at the terminal Saturday morning (medium confidence). By the afternoon, a moderate northwest breeze prevails and gradually becomes southwest post-sunset.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...VFR. Light E-SE breezes persist through the morning while gradually becoming onshore (NW) up to 10 kt by the afternoon. Post-sunset, light offshore winds prevail once again.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.