Records for Riverside Area, California (RALthr) on 05-21
Record Highs
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1: 105°F (2000)
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2: 101°F (2003)
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3: 100°F (1988)
Record Lows
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1: 36°F (1948)
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2: 37°F (1902)
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3: 41°F (1945)
Lowest Highs
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1: 63°F (2008)
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2: 63°F (1997)
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3: 62°F (2017)
Highest Lows
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1: 63°F (1921)
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2: 63°F (1903)
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3: 64°F (1920)
Highest May temperature:
110°F on 05-29-1984.
Lowest May temperature:
33°F on 05-01-1915.
Average temperature is 68.4°F
Average high is 81.3°F
Average low is 55.5°F
Temperature data from 1893 to 2022.
Record Precipitation
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1: 0.63" (1920)
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2: 0.53" (1919)
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3: 0.24" (1957)
Precipitation data from 1893 to 2022.