Spring
66°F / 49°F
March, April, May: about 4.6 in of rain.
Plan a visit
Best time to visit San Mateo
June, July, August bring mild highs and the least rain.
San Mateo by season
Month-by-month planner
| Month | Weather | High / low | Rain | Local guides |
|---|---|---|---|---|
| January | Wet | 58°F / 45°F | 3.9 in | |
| February | Wet | 61°F / 46°F | 4.0 in | Valentine’s Day |
| March | Wet | 63°F / 48°F | 2.7 in | St. Patrick’s Day |
| April | Great | 66°F / 49°F | 1.4 in | |
| May | Great | 68°F / 52°F | 0.50 in | |
| June | Great | 72°F / 54°F | 0.10 in | Fourth of July |
| July | Great | 73°F / 55°F | 0.00 in | Fourth of July |
| August | Great | 73°F / 56°F | 0.00 in | |
| September | Great | 75°F / 56°F | 0.10 in | Halloween |
| October | Great | 72°F / 53°F | 0.80 in | Halloween |
| November | Good | 64°F / 49°F | 2.0 in | Halloween, Thanksgiving, Christmas |
| December | Wet | 58°F / 45°F | 4.1 in | Christmas, New Year’s Eve |
“Great” means highs between 65°F and 85°F with fewer than 10 wet days. Averages are NOAA’s 1991–2020 normals for the San Francisco Intl Ap station, not a forecast.
Questions
What is the best month to visit San Mateo?
June, July, August: highs between 65°F and 85°F with the least rain.
What is the hottest month in San Mateo?
September, averaging 75°F highs.
What is the coldest month in San Mateo?
January, with average lows of 45°F.
What is the rainiest month in San Mateo?
December, averaging 4.1 in of precipitation.
When are the big holidays in San Mateo?
See the local guides: Halloween (October), Thanksgiving (November), Christmas lights (late November to December), New Year’s Eve.