Santa Rosa weather by month
Average highs run from 60°F in January to 82°F in July, and January nights average 38°F. It gets 32 inches of rain and melted snow a year, with almost no snow. The most comfortable months are April to November.
Best time to visit Santa Rosa
For comfortable weather, go in April to November. In those months the average high stays between 62°F and 86°F, nights average 42°F or warmer, and rain stays under 4.5 inches for the month.
Month by month
| Month | High | Low | Precip. | Snow | Wet days | Days 90°F+ | Nights below 32°F | Feels |
|---|---|---|---|---|---|---|---|---|
| January | 60°F | 38°F | 5.8 in | 0.0 in | 9 | 0 | 4 | cool |
| February | 64°F | 40°F | 6.4 in | 0.0 in | 9 | 0 | 3 | mild days, chilly nights |
| March | 67°F | 42°F | 4.3 in | 0.0 in | 8 | 0 | 1 | mild days, chilly nights |
| April | 71°F | 44°F | 2.0 in | 0.0 in | 5 | 0 | 0 | mild |
| May | 75°F | 48°F | 1.3 in | 0.0 in | 3 | 1 | 0 | mild |
| June | 80°F | 51°F | 0.3 in | 0.0 in | 1 | 5 | 0 | warm |
| July | 82°F | 52°F | 0.0 in | 0.0 in | 0 | 4 | 0 | warm |
| August | 83°F | 53°F | 0.0 in | 0.0 in | 0 | 6 | 0 | warm |
| September | 84°F | 51°F | 0.2 in | 0.0 in | 0 | 7 | 0 | warm |
| October | 79°F | 48°F | 1.6 in | 0.0 in | 2 | 3 | 0 | warm |
| November | 67°F | 42°F | 3.3 in | 0.0 in | 5 | 0 | 2 | mild |
| December | 59°F | 38°F | 6.5 in | 0.0 in | 9 | 0 | 6 | cool |
| Year | 72°F avg | 46°F avg | 31.5 in | 0.0 in | 52 | 26 | 15 |
"Wet days" are days with at least 0.1 inch of precipitation. "Feels" is a plain-language label for the average high. Normals for 1991-2020 from NOAA NCEI, station Santa Rosa, CA (USC00047965), 1.1 miles from the city center. Averages describe typical conditions, not a forecast.
Sunrise, sunset and daylight in Santa Rosa
The shortest day is December 21, with 9h 29m of daylight; the longest is June 20, with 14h 51m. The earliest sunset comes around December 2 (4:49 pm) and the latest around June 21 (8:38 pm). The sun sets after 8 pm on 112 days a year.
| On the 15th of | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:26 am | 5:14 pm | 9h 47m |
| February | 7:01 am | 5:48 pm | 10h 48m |
| March | 7:21 am | 7:17 pm | 11h 56m |
| April | 6:34 am | 7:47 pm | 13h 12m |
| May | 5:59 am | 8:15 pm | 14h 16m |
| June | 5:46 am | 8:36 pm | 14h 50m |
| July | 5:59 am | 8:33 pm | 14h 34m |
| August | 6:25 am | 8:04 pm | 13h 39m |
| September | 6:52 am | 7:18 pm | 12h 26m |
| October | 7:20 am | 6:32 pm | 11h 12m |
| November | 6:52 am | 4:57 pm | 10h 05m |
| December | 7:21 am | 4:50 pm | 9h 30m |
Calculated for 2026 at the center of Santa Rosa with NOAA's solar equations, in local clock time (Pacific Time, including daylight saving time where it applies). Times shift by a minute or two from year to year.
Is Santa Rosa getting warmer?
The last 10 years averaged 2.0°F warmer than the 20th century. See the climate stripes for Santa Rosa.Frequently asked questions
What is the warmest month in Santa Rosa?
September is the warmest month, with an average high of 84°F and an average low of 51°F (NOAA 1991-2020 normals).
What is the coldest month in Santa Rosa?
December is the coldest, with average lows of 38°F and highs of 59°F.
What is the rainiest month in Santa Rosa?
December gets the most precipitation, 6.5 inches on average. July is the driest at 0.0 inches.
Does it snow in Santa Rosa?
Very little. The normal yearly snowfall is under one inch.
When is the best time to visit Santa Rosa?
For comfortable weather, April to November. Those months average highs between 62 and 86°F with lows of 42°F or more and modest rain.
Thinking of moving to Santa Rosa?
See what homes, rent and everyday prices cost, who lives there and how it compares with nearby cities on the full Santa Rosa profile.
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