Costa Mesa, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Costa Mesa, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 114°F (46°C) | July 6, 2018 |
| Record Low | 15.9°F (-9°C) | January 12, 1989 |
| Lowest High | 44.9°F (7°C) | February 17, 1932 and December 13, 1932 |
| Highest Low | 80.9°F (27°C) | July 17, 2006 |
| Highest Mean | 93.0°F (34°C) | September 4, 2022 |
| Lowest Mean | 37.9°F (3°C) | January 20, 1922 and January 10, 1949 |
| Precipitation | ||
| Max in One Calendar Day | 4.69" (119.1 mm) | February 16, 1927 |
| Max in One Month | 13.99" (355.3 mm) | February 1998 |
| Least in One Month | 0.00" (0.0 mm) | August 1916 |
| Max in One Year | 32.36" (821.9 mm) | 1941 |
| Least in One Year | 3.26" (82.9 mm) | 2013 |
| Period of Record | ||
| Temperature | May 17, 1916 – May 31, 2026 | |
| Precipitation | April 1, 1906 – May 31, 2026 | |
| Snowfall | August 1, 1916 – December 31, 2010 | |
Note: Records compiled from NOAA GHCN-Daily observations at SANTA ANA FIRE STN (5 mi from Costa Mesa, 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 Costa Mesa, CA?
The all-time record high in Costa Mesa, CA is 114°F (46°C), set on July 6, 2018.
What is the coldest temperature ever recorded in Costa Mesa, CA?
The all-time record low in Costa Mesa, CA is 15.9°F (-9°C), set on January 12, 1989.
What is the most rain Costa Mesa, CA has ever had in one day?
The most precipitation recorded in one calendar day near Costa Mesa, CA is 4.69 inches, on February 16, 1927.
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Costa Mesa Weather History
Monthly averages, records, and climate data for Costa Mesa
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