Petaluma, CA 94952 Monthly Weather

Sonoma County10:42 PM PDT38.24°N, 122.68°W
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October 2026

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188°/48°Avg 80°/50°
290°/51°Avg 80°/50°
397°/54°Avg 80°/50°
4Avg 80°/49°
5Avg 79°/49°
6Avg 79°/49°
790°/51°Avg 79°/49°
890°/50°Avg 79°/49°
979°/54°Avg 78°/49°
1069°/57°Avg 78°/49°
11Avg 78°/48°
12Avg 78°/48°
13Avg 78°/48°
1480°/42°Avg 77°/48°
1587°/45°Avg 77°/48°
1690°/47°Avg 77°/48°
1790°/46°Avg 76°/48°
18Avg 76°/47°
19Avg 76°/47°
20 Mostly Cloudy –/48°Avg 76°/47°
21 Areas Of Fog then Mostly Cloudy 73°/48°Avg 75°/47°
22 Areas Of Fog 69°/43°Avg 75°/47°
23 Areas Of Fog then Mostly Sunny 75°/39°Avg 74°/46°
24 Sunny 77°/40°Avg 74°/46°
25 Mostly Sunny 78°/42°Avg 74°/46°
26 Areas Of Fog then Mostly Sunny 77°/42°Avg 74°/46°
27 Areas Of Fog then Mostly Sunny 76°/–Avg 73°/46°
28 Cloudy 83°/56°Avg 73°/46°
29 Partly cloudy 78°/56°Avg 72°/46°
30Avg 72°/45°
31Avg 72°/45°
Average high86° (normal 78°)
Average low50° (normal 49°)
Warmest / coldest97° / 42°
Precipitation0.00 in (normal 0.33 in to date)
Record high today93° (1929)
Record low today32° (1919)

Observed: Petaluma Airport, 6 km away, records since 1893. Normals 1991–2020. Climate data from NOAA's Regional Climate Centers (ACIS); recent days are preliminary. Days ahead: the forecast.

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.