Records for Hillsboro Area, Oregon (HIOthr) on 12-20
Record Highs
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1: 61°F (1974)
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2: 58°F (1972)
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3: 57°F (2014)
Record Lows
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1: 13°F (1998)
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2: 13°F (1990)
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3: 15°F (1984)
Lowest Highs
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1: 51°F (1972)
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2: 50°F (2019)
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3: 49°F (1974)
Highest Lows
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1: 25°F (1998)
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2: 27°F (1990)
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3: 30°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: 1.40" (1964)
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2: 1.30" (1955)
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3: 1.26" (1982)
Precipitation data from 1929 to 2022.