Riverside, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Riverside, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 116°F (47°C) | September 6, 2020 |
| Record Low | 17°F (-8°C) | December 21, 1968 |
| Lowest High | 37°F (3°C) | January 10, 1949 |
| Highest Low | 78.9°F (26°C) | August 31, 1967 and August 17, 2012 |
| Highest Mean | 93.5°F (34°C) | September 3, 2022 |
| Lowest Mean | 30.5°F (-1°C) | January 10, 1949 |
| Precipitation | ||
| Max in One Calendar Day | 2.31" (58.7 mm) | January 26, 1956 |
| Max in One Month | 8.89" (225.7 mm) | February 1969 |
| Least in One Month | 0.00" (0.0 mm) | June 1949 |
| Max in One Year | 18.62" (473.0 mm) | 1952 |
| Least in One Year | 3.46" (88.0 mm) | 1961 |
| Snowfall | ||
| Max in One Calendar Day | 3.0" (7.6 cm) | January 11, 1949 |
| Max in One Month | 4.9" (12.4 cm) | January 1949 |
| Max in One Season | 4.9" (12.4 cm) | 1948-49 |
| Max in One Year | 4.9" (12.4 cm) | 1949 |
| Earliest Snow | 0.8" (2.0 cm) | December 13, 1967 |
| Earliest Measurable Snow | 0.8" (2.0 cm) | December 13, 1967 |
| Latest Snow | 0.6" (1.5 cm) | March 1, 1953 |
| Latest Measurable Snow | 0.6" (1.5 cm) | March 1, 1953 |
| Period of Record | ||
| Temperature | January 1, 1949 – February 6, 2025 | |
| Precipitation | January 1, 1949 – February 6, 2025 | |
| Snowfall | January 1, 1949 – January 11, 2025 | |
Note: Records compiled from NOAA GHCN-Daily observations at MARCH AFB (9 mi from Riverside, 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 Riverside, CA?
The all-time record high in Riverside, CA is 116°F (47°C), set on September 6, 2020.
What is the coldest temperature ever recorded in Riverside, CA?
The all-time record low in Riverside, CA is 17°F (-8°C), set on December 21, 1968.
What is the most rain Riverside, CA has ever had in one day?
The most precipitation recorded in one calendar day near Riverside, CA is 2.31 inches, on January 26, 1956.
What is the biggest snowfall ever recorded in Riverside, CA?
The most snow recorded in one calendar day near Riverside, CA is 3.0 inches, on January 11, 1949.
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