San Mateo, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in San Mateo, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 105.9°F (41°C) | June 14, 1961 |
| Record Low | 24°F (-4°C) | December 9, 1972 |
| Lowest High | 37°F (3°C) | December 9, 1972 |
| Highest Low | 71.9°F (22°C) | September 2, 2017 |
| Highest Mean | 88.0°F (31°C) | September 2, 2017 |
| Lowest Mean | 30.5°F (-1°C) | December 9, 1972 |
| Precipitation | ||
| Max in One Calendar Day | 5.59" (142.0 mm) | January 4, 1982 |
| Max in One Month | 13.64" (346.4 mm) | February 1998 |
| Least in One Month | 0.00" (0.0 mm) | June 2002 |
| Max in One Year | 38.34" (973.9 mm) | 1983 |
| Least in One Year | 3.39" (86.0 mm) | 2013 |
| Snowfall | ||
| Max in One Calendar Day | 1.5" (3.8 cm) | January 21, 1962 |
| Max in One Month | 1.5" (3.8 cm) | January 1962 |
| Max in One Season | 1.5" (3.8 cm) | 1961-62 |
| Max in One Year | 1.5" (3.8 cm) | 1962 |
| Earliest Snow | 1.5" (3.8 cm) | January 21, 1962 |
| Earliest Measurable Snow | 1.5" (3.8 cm) | January 21, 1962 |
| Latest Snow | 1.5" (3.8 cm) | January 21, 1962 |
| Latest Measurable Snow | 1.5" (3.8 cm) | January 21, 1962 |
| Period of Record | ||
| Temperature | July 1, 1945 – February 6, 2025 | |
| Precipitation | July 1, 1945 – February 6, 2025 | |
| Snowfall | July 1, 1945 – September 30, 2013 | |
Note: Records compiled from NOAA GHCN-Daily observations at SAN FRANCISCO INTL AP (4 mi from San Mateo, CA). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in San Mateo, CA?
The all-time record high in San Mateo, CA is 105.9°F (41°C), set on June 14, 1961.
What is the coldest temperature ever recorded in San Mateo, CA?
The all-time record low in San Mateo, CA is 24°F (-4°C), set on December 9, 1972.
What is the most rain San Mateo, CA has ever had in one day?
The most precipitation recorded in one calendar day near San Mateo, CA is 5.59 inches, on January 4, 1982.
What is the biggest snowfall ever recorded in San Mateo, CA?
The most snow recorded in one calendar day near San Mateo, CA is 1.5 inches, on January 21, 1962.
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