Records for Riverside Area, California (RALthr) on 09-18
Record Highs
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1: 108°F (1917)
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2: 107°F (1939)
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3: 107°F (1922)
Record Lows
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1: 42°F (1933)
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2: 44°F (1907)
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3: 44°F (1905)
Lowest Highs
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1: 69°F (1984)
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2: 68°F (2014)
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3: 68°F (2008)
Highest Lows
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1: 69°F (1965)
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2: 70°F (1945)
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3: 71°F (1999)
Highest September temperature:
117°F on 09-05-2020.
Lowest September temperature:
37°F on 09-15-1902.
Average temperature is 76.8°F
Average high is 93°F
Average low is 60.5°F
Temperature data from 1893 to 2022.
Record Precipitation
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1: 1.37" (1963)
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2: 0.73" (1965)
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3: 0.41" (1981)
Precipitation data from 1893 to 2022.