Records for Riverside Area, California (RALthr) on 05-18
Record Highs
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1: 103°F (2008)
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2: 100°F (1920)
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3: 99°F (1986)
Record Lows
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1: 40°F (1903)
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2: 41°F (1902)
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3: 42°F (1945)
Lowest Highs
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1: 74°F (2008)
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2: 64°F (1997)
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3: 61°F (2001)
Highest Lows
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1: 63°F (1938)
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2: 66°F (2011)
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3: 66°F (1994)
Highest May temperature:
110°F on 05-29-1984.
Lowest May temperature:
33°F on 05-01-1915.
Average temperature is 68°F
Average high is 80.8°F
Average low is 55.2°F
Temperature data from 1893 to 2022.
Record Precipitation
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1: 0.22" (2011)
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2: 0.10" (1917)
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3: 0.03" (1921)
Precipitation data from 1893 to 2022.