Best Time to Visit San Mateo, California, USA
San Mateo is at its sunniest and driest in May–October.
The best time to visit San Mateo for sunny, dry weather is May–October — 6 months of the year fit our sunny profiles at this specific location. The drier stretch runs through April–October; the wetter half falls in November–March. At the city itself, monthly average temperatures range from 9.7°C / 49.5°F in January to 18.2°C / 64.8°F in August, with rainfall from 2 mm / 0.1 in (July) to 121 mm / 4.8 in (January). These are point-value climate normals sampled at San Mateo, California, United States of America's coordinates — usually more actionable for travellers than the country-wide average. San Mateo's climate is broadly seasonal. The full month-by-month table below lets you match your travel window against our five weather profiles.
Recommended months
| Month | Temp | Rain | Feels like |
|---|---|---|---|
| May | 14.8°C58.6°F | 11 mm0.4″ | Sunny & Mild |
| June | 16.7°C62.1°F | 4 mm0.2″ | Sunny & Mild |
| July | 17.8°C64°F | 2 mm0.1″ | Sunny & Mild |
| August | 18.2°C64.8°F | 3 mm0.1″ | Sunny & Mild |
| September | 18.1°C64.6°F | 7 mm0.3″ | Sunny & Mild |
| October | 16°C60.8°F | 34 mm1.3″ | Sunny & Mild |
Frequently asked questions
When is the best time to visit San Mateo?
The best time to visit San Mateo for sunny, dry weather is May, June, July, August, September, October. At the city itself, the warmest month is August averaging 18.2°C / 64.8°F, and the driest is July with about 2 mm / 0.1 in of rain. These are point-value climate normals sampled at San Mateo's coordinates.
When is the rainy season in San Mateo?
The rainy season at San Mateo, California runs through November–March, when monthly rainfall exceeds the annual median of about 39 mm / 1.5 in. The wettest single month is January (121 mm / 4.8 in).
What is the driest month in San Mateo?
The driest month in San Mateo is July, averaging about 2 mm / 0.1 in of rainfall. Temperature that month averages 17.8°C / 64°F.
What months should I avoid visiting San Mateo?
The least comfortable months for travel to San Mateo — based on point-value climate at the city — are January, February, March, December. These are the wettest or coolest months at this location. Rainfall peaks at 121 mm / 4.8 in in January, and the coldest month averages 9.7°C / 49.5°F.
Is San Mateo climate different from United States of America overall?
Yes, usually. Our San Mateo figures are point-value climate normals sampled at the city itself, while our United States of America figures are area-weighted averages across the whole country. The two can diverge substantially in geographically diverse or elevation-varied countries. The month-by-month table below reflects San Mateo specifically — usually the more actionable data for a traveller planning to spend time in the city.