Santa Rosa, CA Weather Forecast for 5-Days

Updated: Wed Feb 18th 2026 3:30 AM PST

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Santa Rosa, CA Weather – 2-18 – Scattered Showers
50° / 34°
Scattered Showers
Santa Rosa may see scattered showers, with daytime highs of 50°F and overnight lows near 34°F. The chance of rain is 88% with an estimated 0.07in. Winds will be light at 8mph and gusts of 9.5mph at 4 PM. High humidity with average of 84% is anticipated, the maximum being 96% at 10 PM and 59% being its lowest at 3 PM. Barometric pressure is its highest of 29.99inHg at 6 PM, a lowest point of 29.78inHg at 5 AM with an avg 29.93inHg.
Santa Rosa, CA Weather – 2-19 – Heavy Rain
54° / 39°

Weather Tomorrow

Heavy Rain
Daytime highs will reach 54°F with lows dropping to 39°F in Santa Rosa, where it will rain at times. The chance of rain is 89% with an estimated 2.36in. Winds will be light at 10mph and gusts of 12.2mph at 6 PM. High humidity with average of 83% is anticipated, the maximum being 98% at 11 PM and 60% being its lowest at 2 PM. Barometric pressure is its highest of 29.99inHg at 10 PM, a lowest point of 29.53inHg at 5 AM with an avg 29.78inHg.
Santa Rosa, CA Weather – 2-20 – Partly Cloudy
49° / 29°
Partly Cloudy
In Santa Rosa, cloudy skies are likely with a high near 49°F and a low around 29°F. Winds will be light at 5mph and gusts of 6.1mph at 6 PM. High humidity with average of 81% is anticipated, the maximum being 98% at 5 AM and 60% being its lowest at 2 PM. Barometric pressure is its highest of 30.13inHg at 11 AM, a lowest point of 29.92inHg at 12 AM with an avg 30.08inHg.
Santa Rosa, CA Weather – 2-21 – Scattered Showers
53° / 32°
Scattered Showers
Highs will reach 53°F with lows near 32°F in Santa Rosa, where scattered showers are. Rainfall predicted to have a 62% chance with an estimated 0.02in. Winds will be light at 10mph and gusts of 11.1mph at 1 PM. The humidity will be on the higher side, averaging about 80%, the maximum being 93% at 7 AM and 56% being its lowest at 1 PM. Barometric pressure is its highest of 30.17inHg at 8 AM, a lowest point of 30inHg at 5 PM with an avg 30.11inHg.
Santa Rosa, CA Weather – 2-22 – Scattered Showers
59° / 39°
Scattered Showers
Showers likely at times in Santa Rosa, with a high of 59°F and a low of 39°F. Rainfall predicted to have a 62% chance with an estimated 0.2in. Wind will be moderate, blowing around 12mph on average and gusts of 20mph at 9 AM. High humidity with average of 85% is anticipated, the maximum being 94% at 5 AM and 63% being its lowest at 10 AM. Barometric pressure is its highest of 30.16inHg at 11 AM, a lowest point of 29.95inHg at 3 AM with an avg 30.09inHg.
Santa Rosa, CA Weather – 2-23 – Heavy Rain
55° / 52°
Heavy Rain
Daytime highs will reach 55°F with lows dropping to 52°F in Santa Rosa, where periods of rain are likely. The chance of rain is 89% with an estimated 0.95in. Winds will be light at 9mph and gusts of 13.9mph at 12 AM. High humidity with average of 97% is anticipated, the maximum being 99% at 11 PM and 93% being its lowest at 12 AM. Barometric pressure is its highest of 30.14inHg at 12 AM, a lowest point of 29.97inHg at 4 PM with an avg 30.05inHg.

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