Records for Hillsboro Area, Oregon (HIOthr) on 09-12
Record Highs
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1: 91°F (1975)
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2: 90°F (2015)
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3: 89°F (2009)
Record Lows
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1: 38°F (1986)
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2: 39°F (1967)
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3: 39°F (1964)
Lowest Highs
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1: 59°F (2022)
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2: 58°F (1960)
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3: 57°F (2013)
Highest Lows
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1: 60°F (1982)
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2: 62°F (1962)
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3: 64°F (1996)
Highest September temperature:
103°F on 09-03-1988.
Lowest September temperature:
29°F on 09-17-1965.
Average temperature is 63.1°F
Average high is 77.9°F
Average low is 48.3°F
Temperature data from 1929 to 2022.
Record Precipitation
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1: 0.40" (1941)
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2: 0.33" (1936)
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3: 0.33" (1934)
Precipitation data from 1929 to 2022.