Records for Hillsboro Area, Oregon (HIOthr) on 05-21
Record Highs
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1: 91°F (1958)
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2: 89°F (1934)
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3: 87°F (1951)
Record Lows
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1: 32°F (1935)
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2: 34°F (1934)
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3: 35°F (1955)
Lowest Highs
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1: 56°F (1958)
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2: 55°F (1972)
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3: 54°F (2015)
Highest Lows
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1: 49°F (1960)
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2: 53°F (2010)
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3: 57°F (1957)
Highest May temperature:
100°F on 05-29-1983.
Lowest May temperature:
26°F on 05-08-1935.
Average temperature is 57.8°F
Average high is 69.8°F
Average low is 45.8°F
Temperature data from 1929 to 2022.
Record Precipitation
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1: 0.50" (1996)
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2: 0.49" (1953)
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3: 0.48" (2010)
Precipitation data from 1929 to 2022.