Records for Hillsboro Area, Oregon (HIOthr) on 05-15
Record Highs
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1: 94°F (2006)
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2: 89°F (1958)
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3: 88°F (1956)
Record Lows
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1: 30°F (1934)
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2: 33°F (1964)
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3: 33°F (1950)
Lowest Highs
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1: 63°F (1938)
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2: 60°F (1937)
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3: 54°F (2022)
Highest Lows
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1: 53°F (1974)
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2: 55°F (1953)
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3: 56°F (2003)
Highest May temperature:
100°F on 05-29-1983.
Lowest May temperature:
26°F on 05-08-1935.
Average temperature is 56.8°F
Average high is 68.9°F
Average low is 44.7°F
Temperature data from 1929 to 2022.
Record Precipitation
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1: 0.57" (2022)
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2: 0.55" (1942)
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3: 0.50" (2011)
Precipitation data from 1929 to 2022.