Climate averages 1991–2020
Santa Rosa, United States weather
in March.
A mild, wet month: the 9th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a mild month in Santa Rosa, United States: daytime highs average 17.5°C and nights cool to about 6.3°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 112 mm of rain on roughly 10 days, which makes March a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 56 min on an average March day.
The nearest other city in this atlas is Napa (41 km away). In March its highs average 18.0°C, 0.6°C warmer than Santa Rosa, United States, with 86 mm of rain.
Among the 498 cities listed in the United States, Santa Rosa, United States ranks joint 209th of 498 for the warmest March highs and joint 435th of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; Santa Rosa, United States is 2.5°C warmer than that mean.
From March to April, average highs rise by 2.3°C to 19.8°C, and monthly rainfall falls from 112 mm to 49 mm.
The annual picture
March in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Santa Rosa, United States climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 14.4°C4.2°C | 4.2°C | 145 | 10.3 | 9.810 h |
| February | 15.7°C5.0°C | 5.0°C | 149 | 9.5 | 10.711 h |
| March, selected | 17.5°C6.3°C | 6.3°C | 112 | 9.5 | 11.912 h |
| April | 19.8°C7.8°C | 7.8°C | 49 | 5.6 | 13.213 h |
| May | 23.6°C10.6°C | 10.6°C | 28 | 3.6 | 14.214 h |
| June | 27.8°C13.1°C | 13.1°C | 7.0 | 1.2 | 14.815 h |
| July | 29.6°C14.1°C | 14.1°C | 0.4 | 0.1 | 14.615 h |
| August | 29.5°C14.3°C | 14.3°C | 1.1 | 0.2 | 13.714 h |
| September | 28.4°C13.6°C | 13.6°C | 3.1 | 0.6 | 12.512 h |
| October | 24.4°C11.2°C | 11.2°C | 34 | 3.2 | 11.211 h |
| November | 18.0°C7.0°C | 7.0°C | 75 | 6.2 | 10.110 h |
| December | 14.0°C4.2°C | 4.2°C | 150 | 10.2 | 9.510 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
March in nearby cities
- Napa in MarchUnited States · 41 kmHigh 18.0°C · Low 7.5°C · 86 mm rain
- Vallejo in MarchUnited States · 55 kmHigh 17.7°C · Low 7.3°C · 80 mm rain
- Fairfield in MarchUnited States · 63 kmHigh 17.9°C · Low 7.7°C · 79 mm rain
- Vacaville in MarchUnited States · 64 kmHigh 18.2°C · Low 7.7°C · 79 mm rain
- Berkeley in MarchUnited States · 74 kmHigh 16.8°C · Low 7.5°C · 73 mm rain
- San Francisco in MarchUnited States · 78 kmHigh 15.7°C · Low 8.1°C · 81 mm rain
- Concord (California), United States in MarchUnited States · 79 kmHigh 17.8°C · Low 7.9°C · 71 mm rain
- Oakland in MarchUnited States · 81 kmHigh 17.0°C · Low 7.8°C · 73 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Santa Rosa) is explained once on the Santa Rosa, United States year overview and on the Sources, method and limits page.