Historical Weather in San Mateo, CA
See 55+ years of weather history for any date in San Mateo going back to 1970.
Part of California weather history
Look Up a Specific Date
Today in San Mateo Weather HistorySee records, averages, and 55+ years of data for today's date
→Monthly Climate Averages
Historical temperature and precipitation averages for San Mateo, CA, based on 55+ years of weather data.
Warmest MonthSeptemberAvg High: 75°F / Low: 55°F
Coldest MonthDecemberAvg High: 57°F / Low: 44°F
Jan
57°/ 43°
💧 9.9"
Feb
60°/ 45°
💧 8.9"
Mar
62°/ 47°
💧 7.4"
Apr
65°/ 48°
💧 5.4"
May
68°/ 51°
💧 3.1"
Jun
71°/ 53°
💧 3.0"
Jul
73°/ 55°
💧 2.9"
Aug
73°/ 56°
💧 3.0"
Sep
75°/ 55°
💧 2.9"
Oct
71°/ 53°
💧 7.9"
Nov
63°/ 48°
💧 8.6"
Dec
57°/ 44°
💧 9.4"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
San Mateo Temperature Records
- Record High: The hottest temperature ever recorded in San Mateo, CA is 113°F, set on July 22, 2006.
- Record Low: The coldest temperature ever recorded in San Mateo, CA is 19°F, set on December 22, 1990.
- Data Coverage: Based on 57 years of data from NOAA weather station: SAN FRANCISCO INTL AP.
All-Time Record High
113°F
July 22, 2006
All-Time Record Low
19°F
December 22, 1990
Monthly Temperature Records in San Mateo
| Month | Record High | Record Low |
|---|---|---|
| January | 80°F(2021) | 24°F(1976) |
| February | 82°F(2015) | 22°F(2003) |
| March | 89°F(2011) | 28°F(2007) |
| April | 102°F(2009) | 31°F(2008) |
| May | 103°F(2001) | 33°F(2008) |
| June | 111°F(2000) | 36°F(2007) |
| July | 113°F(2006) | 40°F(1982) |
| August | 109°F(1998) | 41°F(1975) |
| September | 113°F(2020) | 32°F(2008) |
| October | 109°F(2024) | 33°F(1971) |
| November | 88°F(1995) | 29°F(1975) |
| December | 76°F(2020) | 19°F(1990) |
San Mateo Snow RecordsSee the top 10 snowiest days ever recorded
→