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Petaluma, CA Weather Forecast

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Overcast

57°F

Updated	8:10 am
Feels Like	54°F
Humidity	87%
Wind	N 0 mph
Barometer	29.96 in
Dew Point	53°F

Overcast

14°C

Updated	8:10 am
Feels Like	12°C
Humidity	87%
Wind	N 0 km/h
Barometer	101.5 kPa
Dew Point	12°C

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Cloud Cover	32%
uv UV Index	6
Sunrise	6:58 AM
Sunset	7:07 PM
Moonrise	5:15 PM
Moonset	2:43 AM

Civil Twilight
6:29 AM to 6:56 AM
7:07 PM to 7:34 PM
Petaluma CA Weather - Waxing Gibbous Moon

Waxing Gibbous Moon

Petaluma Weather Forecast

TODAY	TONIGHT	WEDNESDAY	WEDNESDAY NIGHT	THURSDAY	THURSDAY NIGHT	FRIDAY	FRIDAY NIGHT	SATURDAY	SATURDAY NIGHT	SUNDAY	SUNDAY NIGHT

Mostly Cloudy	Fog	Partly Cloudy	Mostly Clear	Partly Cloudy	Partly Cloudy	Partly Cloudy	Mostly Clear	Partly Cloudy	Patchy Fog	Partly Cloudy	Mostly Clear
Hi: 76°FHi: 24°C	Lo: 59°FLo: 15°C	Hi: 85°FHi: 29°C	Lo: 56°FLo: 13°C	Hi: 81°FHi: 27°C	Lo: 56°FLo: 13°C	Hi: 76°FHi: 24°C	Lo: 50°FLo: 10°C	Hi: 75°FHi: 24°C	Lo: 50°FLo: 10°C	Hi: 71°FHi: 22°C	Hi: 76°FHi: 24°C Lo: 50°FLo: 10°C

POP = Probability of Precipitation.

Weather Outlook Updated: 602 AM PDT Tue Sep 22 2026 Petaluma, CA Weather - WeatherWorld.com

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Issued: 450 AM PDT Tue Sep 22 2026

Key Messages

Updated at 1201 AM PDT Tue Sep 22 2026

Warming trend begins today through Thursday
Cooler conditions Friday into the weekend

Aviation

... (12Z TAFS) Issued at 427 AM PDT Tue Sep 22 2026

Solid marine layer push overnight leading to mostly MVFR to IFR conditions. Seeing some compression on the marine layer leading to some patchy fog and dz/ra being reported. Expect clearing/rolling back to the coast mid to late morning most areas. HAF and MRY will hold onto CIGS for most of the day. Tonig...