Records for Hillsboro Area, Oregon (HIOthr) on 12-21
Record Highs
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1: 60°F (1955)
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2: 59°F (2020)
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3: 59°F (1972)
Record Lows
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1: 9°F (1990)
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2: 12°F (1998)
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3: 16°F (1983)
Lowest Highs
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1: 52°F (1972)
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2: 49°F (2014)
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3: 45°F (1979)
Highest Lows
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1: 18°F (1990)
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2: 21°F (1998)
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3: 25°F (2008)
Highest December temperature:
64°F on 12-01-1951.
Lowest December temperature:
-2°F on 12-08-1972.
Average temperature is 39.2°F
Average high is 45.5°F
Average low is 32.9°F
Temperature data from 1929 to 2022.
Record Precipitation
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1: 2.81" (1955)
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2: 1.87" (1972)
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3: 1.76" (1934)
Precipitation data from 1929 to 2022.