San Mateo Weather Year-Round — Best Time to Visit
San Mateo, United States has mild weather year-round. The best time to visit is September (score: 94/100). Annual average high: 18.7°C, total rainfall: 511mm.
When is the best time to visit San Mateo?
94
September is the best month to visit San Mateo with a travel score of 94/100 (Excellent).
Expect highs of 23.8°C, 1 rain days, and 11.7 hours of daily sunshine.
View September weather details →Travel Score by Month
62
Jan
67
Feb
72
Mar
78
Apr
84
May
90
Jun
93
Jul
93
Aug
94
Sep
88
Oct
74
Nov
62
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in San Mateo each month?
18.7°C
Avg High
10.7°C
Avg Low
511mm
Annual Rain
How much rain does San Mateo get?
San Mateo receives 511mm of rain annually. The wettest month is typically December with 102mm, while July is the driest.
What is the weather like each month in San Mateo?
January
62
14°C
Low: 7°C
9 rain days
Good
February
67
15°C
Low: 8°C
9 rain days
Good
March
72
16°C
Low: 9°C
9 rain days
Good
April
78
17°C
Low: 9°C
5 rain days
Good
May
84
19°C
Low: 11°C
3 rain days
Excellent
June
90
22°C
Low: 12°C
1 rain days
Excellent
July
93
23°C
Low: 14°C
0 rain days
Excellent
August
93
23°C
Low: 14°C
0 rain days
Excellent
September
Best time to visit94
24°C
Low: 14°C
1 rain days
Excellent
October
88
22°C
Low: 13°C
3 rain days
Excellent
November
74
17°C
Low: 10°C
6 rain days
Good
December
62
14°C
Low: 8°C
10 rain days
Good
Compare San Mateo
Popular comparisons:
Planning a Trip to United States?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
🏛️ 121 countries·📅 Updated yearly·✈️ Free forever
What cities are near San Mateo?
Data based on 1994–2024 averages · Last updated: 2024-12-31