West Covina, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in West Covina, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 102°F (39°C) | July 5, 2007 |
| Record Low | 8.9°F (-13°C) | January 29, 1969 |
| Lowest High | 19°F (-7°C) | December 14, 1967 |
| Highest Low | 78.9°F (26°C) | July 18, 1960 and June 8, 1978 and June 20, 1978 |
| Highest Mean | 90°F (32°C) | July 5, 2007 |
| Lowest Mean | 14.5°F (-10°C) | December 14, 1967 |
| Precipitation | ||
| Max in One Calendar Day | 11.96" (303.8 mm) | January 25, 1969 |
| Max in One Month | 37.83" (960.8 mm) | January 1969 |
| Least in One Month | 0.00" (0.0 mm) | November 1948 |
| Max in One Year | 91.13" (2314.8 mm) | 1983 |
| Least in One Year | 8.56" (217.4 mm) | 2009 |
| Snowfall | ||
| Max in One Calendar Day | 16.0" (40.6 cm) | December 29, 1974 |
| Max in One Month | 40.0" (101.7 cm) | January 1949 |
| Max in One Season | 82.5" (209.6 cm) | 1948-49 |
| Max in One Year | 60.0" (152.4 cm) | 1949 |
| Earliest Snow | 1.0" (2.5 cm) | October 17, 1971 |
| Earliest Measurable Snow | 1.0" (2.5 cm) | October 17, 1971 |
| Latest Snow | 1.0" (2.5 cm) | May 12, 1977 |
| Latest Measurable Snow | 1.0" (2.5 cm) | May 12, 1977 |
| Period of Record | ||
| Temperature | July 1, 1948 – June 30, 2026 | |
| Precipitation | July 1, 1948 – June 30, 2026 | |
| Snowfall | July 1, 1948 – June 30, 2026 | |
Note: Records compiled from NOAA GHCN-Daily observations at MT WILSON CBS (14 mi from West Covina, 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 West Covina, CA?
The all-time record high in West Covina, CA is 102°F (39°C), set on July 5, 2007.
What is the coldest temperature ever recorded in West Covina, CA?
The all-time record low in West Covina, CA is 8.9°F (-13°C), set on January 29, 1969.
What is the most rain West Covina, CA has ever had in one day?
The most precipitation recorded in one calendar day near West Covina, CA is 11.96 inches, on January 25, 1969.
What is the biggest snowfall ever recorded in West Covina, CA?
The most snow recorded in one calendar day near West Covina, CA is 16.0 inches, on December 29, 1974.
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