Records for Hillsboro Area, Oregon (HIOthr) on 09-18
Record Highs
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1: 92°F (1991)
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2: 92°F (1952)
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3: 91°F (1999)
Record Lows
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1: 30°F (1965)
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2: 36°F (2007)
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3: 36°F (1988)
Lowest Highs
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1: 59°F (2020)
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2: 58°F (2011)
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3: 57°F (2014)
Highest Lows
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1: 57°F (2004)
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2: 58°F (1986)
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3: 60°F (1972)
Highest September temperature:
103°F on 09-03-1988.
Lowest September temperature:
29°F on 09-17-1965.
Average temperature is 61.6°F
Average high is 76°F
Average low is 47.2°F
Temperature data from 1929 to 2022.
Record Precipitation
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1: 1.24" (2021)
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2: 1.12" (1968)
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3: 0.81" (1931)
Precipitation data from 1929 to 2022.