Records for Ontario Area, Oregon (ONOthr) on 05-31
Record Highs
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1: 101°F (1972)
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2: 98°F (1986)
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3: 96°F (1977)
Record Lows
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1: 34°F (1990)
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2: 36°F (1974)
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3: 37°F (1978)
Lowest Highs
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1: 64°F (2017)
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2: 64°F (1983)
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3: 62°F (2021)
Highest Lows
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1: 60°F (1990)
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2: 61°F (1949)
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3: 62°F (1954)
Highest May temperature:
103°F on 05-29-1986.
Lowest May temperature:
25°F on 05-01-1946.
Average temperature is 64.3°F
Average high is 77.7°F
Average low is 50.9°F
Temperature data from 1945 to 2022.
Record Precipitation
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1: 0.52" (1954)
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2: 0.36" (2010)
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3: 0.31" (1949)
Precipitation data from 1945 to 2022.