Records for Portland Area, Oregon (PDXthr) on 05-20
Record Highs
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1: 91°F (1963)
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2: 87°F (1967)
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3: 84°F (1978)
Record Lows
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1: 37°F (1975)
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2: 43°F (2021)
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3: 43°F (2001)
Lowest Highs
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1: 57°F (2012)
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2: 57°F (2006)
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3: 56°F (1985)
Highest Lows
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1: 54°F (1960)
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2: 55°F (2007)
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3: 56°F (2010)
Highest May temperature:
100°F on 05-28-1983.
Lowest May temperature:
29°F on 05-01-1954.
Average temperature is 59.6°F
Average high is 69°F
Average low is 50.1°F
Temperature data from 1940 to 2022.
Record Precipitation
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1: 0.68" (1998)
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2: 0.55" (1961)
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3: 0.48" (1960)
Precipitation data from 1940 to 2022.