Marine Weather Net

Petaluma, CA Weather Forecast




Petaluma, California

 Lat: 38.23N, Lon: 122.64W

Current Conditions Updated: 854 AM PST SUN JAN 18 2026

Mostly Cloudy
Temp: 49°F
  • Humidity:
  • 86%
  • Winds:
  • 5 MPH E
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.2 in.
  • Dewpoint:
  • 45°F
  • Heat index:
  • 49°F

  • Sunrise:
  • 7:24 AM PST
  • Sunset:
  • 5:15 PM PST
  • Moonrise:
  • 7:40 AM PST
  • Moonset:
  • 5:17 PM PST

TODAY

PARTLY CLOUDY
Hi: 69°F
Lo: 45°F

MARTIN LUTHER KING JR DAY

SUNNY

Hi: 69°F
Lo: 49°F

TUESDAY

PARTLY CLOUDY
Hi: 69°F
Lo: 49°F

WEDNESDAY

MOSTLY CLOUDY
Hi: 60°F
Lo: 45°F
Weather Forecast In Detail:
Forecast Issued: 601 AM PST Sun Jan 18 2026

Today...Mostly cloudy in the morning then becoming partly cloudy. Patchy dense fog in the morning. Highs in the 50s to upper 60s. Northeast winds 5 to 10 mph...Becoming southeast in the afternoon.
Tonight...Partly cloudy. Patchy dense fog. Lows in the 40s to lower 50s. North winds up to 5 mph.
Martin Luther King Jr Day...Partly cloudy in the morning then becoming sunny. Patchy dense fog in the morning. Highs in the 50s to upper 60s. Northeast winds up to 5 mph...Becoming south around 5 mph in the afternoon.
Monday Night...Mostly clear in the evening then becoming partly cloudy. Patchy fog. Lows in the 30s to upper 40s. Northeast winds up to 5 mph.
Tuesday...Partly cloudy. Patchy fog in the morning. Highs in the 50s to upper 60s. Northeast winds 5 to 10 mph.
Tuesday Night...Partly cloudy in the evening then becoming mostly cloudy. Patchy fog. Lows in the 30s to upper 40s.
Wednesday...Mostly cloudy. Highs in the upper 50s to mid 60s.
Wednesday Night...Mostly cloudy. Patchy fog. Lows in the 40s.
Thursday...Partly cloudy. Patchy fog. Highs in the 50s to mid 60s. Lows in the 30s to upper 40s. && temperature / precipitation santa rosa 67 41 67 / san rafael 62 46 63 / napa 65 44 64 /
Friday...Partly cloudy. Patchy fog. Highs in the 50s to mid 60s. Lows in the 30s to upper 40s. && temperature / precipitation santa rosa 67 41 67 / san rafael 62 46 63 / napa 65 44 64 /
Saturday...Partly cloudy. Patchy fog. Highs in the 50s to mid 60s. Lows in the 30s to upper 40s. && temperature / precipitation santa rosa 67 41 67 / san rafael 62 46 63 / napa 65 44 64 /
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