San Diego, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in San Diego, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 111°F (44°C) | September 26, 1963 |
| Record Low | 28.9°F (-2°C) | January 4, 1949 |
| Lowest High | 46°F (8°C) | January 11, 1949 |
| Highest Low | 78°F (26°C) | September 9, 1984 and September 17, 1984 and September 11, 2015 |
| Highest Mean | 92°F (33°C) | September 26, 1963 |
| Lowest Mean | 40.4°F (5°C) | January 4, 1949 |
| Precipitation | ||
| Max in One Calendar Day | 2.73" (69.3 mm) | January 22, 2024 |
| Max in One Month | 9.09" (230.8 mm) | January 1993 |
| Least in One Month | 0.00" (0.0 mm) | July 1939 |
| Max in One Year | 24.96" (633.9 mm) | 1941 |
| Least in One Year | 3.42" (86.8 mm) | 1953 |
| Period of Record | ||
| Temperature | July 1, 1939 – February 6, 2025 | |
| Precipitation | July 1, 1939 – February 6, 2025 | |
| Snowfall | July 1, 1939 – January 11, 2025 | |
Note: Records compiled from NOAA GHCN-Daily observations at SAN DIEGO INTL AP (2 mi from San Diego, 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 Diego, CA?
The all-time record high in San Diego, CA is 111°F (44°C), set on September 26, 1963.
What is the coldest temperature ever recorded in San Diego, CA?
The all-time record low in San Diego, CA is 28.9°F (-2°C), set on January 4, 1949.
What is the most rain San Diego, CA has ever had in one day?
The most precipitation recorded in one calendar day near San Diego, CA is 2.73 inches, on January 22, 2024.
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