Records for Hillsboro Area, Oregon (HIOthr) on 12-18
Record Highs
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1: 58°F (1931)
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2: 57°F (1936)
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3: 56°F (2018)
Record Lows
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1: 8°F (1964)
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2: 16°F (1965)
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3: 19°F (1948)
Lowest Highs
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1: 45°F (2017)
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2: 45°F (1994)
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3: 45°F (1947)
Highest Lows
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1: 19°F (1964)
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2: 32°F (2006)
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3: 32°F (1989)
Highest December temperature:
64°F on 12-01-1951.
Lowest December temperature:
-2°F on 12-08-1972.
Average temperature is 39.3°F
Average high is 45.6°F
Average low is 32.9°F
Temperature data from 1929 to 2022.
Record Precipitation
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1: 1.30" (1932)
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2: 1.06" (1947)
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3: 1.04" (2021)
Precipitation data from 1929 to 2022.