Climate averages 1991–2020
San Mateo weather
in March.
A mild, moderately 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 San Mateo: daytime highs average 16.1°C and nights cool to about 8.5°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 82 mm of rain on roughly 9 days, which makes March a moderately 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 Redwood City (12 km away). In March its highs average 16.2°C, about as warm as San Mateo, with 82 mm of rain.
Among the 498 cities listed in the United States, San Mateo ranks joint 249th of 498 for the warmest March highs and joint 286th of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; San Mateo is 1.2°C warmer than that mean.
From March to April, average highs rise by 1.3°C to 17.4°C, and monthly rainfall falls from 82 mm to 41 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
San Mateo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.9°C6.7°C | 6.7°C | 99 | 9.4 | 9.910 h |
| February | 14.8°C7.5°C | 7.5°C | 107 | 9.5 | 10.811 h |
| March, selected | 16.1°C8.5°C | 8.5°C | 82 | 9.1 | 11.912 h |
| April | 17.4°C9.3°C | 9.3°C | 41 | 5.6 | 13.113 h |
| May | 19.3°C10.9°C | 10.9°C | 20 | 3.3 | 14.214 h |
| June | 21.8°C12.4°C | 12.4°C | 3.9 | 0.9 | 14.715 h |
| July | 23.2°C13.7°C | 13.7°C | 0.5 | 0.2 | 14.514 h |
| August | 23.6°C14.2°C | 14.2°C | 0.7 | 0.1 | 13.614 h |
| September | 24.0°C14.2°C | 14.2°C | 1.8 | 0.4 | 12.512 h |
| October | 21.7°C12.9°C | 12.9°C | 23 | 3.0 | 11.311 h |
| November | 17.0°C9.9°C | 9.9°C | 51 | 6.0 | 10.210 h |
| December | 13.7°C7.2°C | 7.2°C | 94 | 9.3 | 9.610 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
- Redwood City in MarchUnited States · 12 kmHigh 16.2°C · Low 8.6°C · 82 mm rain
- Daly City in MarchUnited States · 20 kmHigh 14.2°C · Low 8.1°C · 81 mm rain
- Hayward in MarchUnited States · 25 kmHigh 17.0°C · Low 8.0°C · 70 mm rain
- San Francisco in MarchUnited States · 25 kmHigh 15.7°C · Low 8.1°C · 81 mm rain
- Union City in MarchUnited States · 27 kmHigh 17.2°C · Low 8.2°C · 75 mm rain
- Oakland in MarchUnited States · 27 kmHigh 17.0°C · Low 7.8°C · 73 mm rain
- Mountain View in MarchUnited States · 29 kmHigh 16.7°C · Low 8.5°C · 75 mm rain
- Fremont in MarchUnited States · 30 kmHigh 17.1°C · Low 8.4°C · 75 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 San Mateo) is explained once on the San Mateo year overview and on the Sources, method and limits page.
Redwood City lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.