Records for Boise Area, Idaho (BOIthr) on 05-18
Record Highs
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1: 95°F (2009)
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2: 93°F (1954)
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3: 93°F (1919)
Record Lows
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1: 30°F (1971)
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2: 31°F (1896)
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3: 32°F (1938)
Lowest Highs
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1: 66°F (1887)
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2: 62°F (2006)
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3: 61°F (2008)
Highest Lows
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1: 44°F (1938)
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2: 52°F (1915)
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3: 53°F (1991)
Highest May temperature:
100°F on 05-29-1897.
Lowest May temperature:
22°F on 05-05-1982.
Average temperature is 60.7°F
Average high is 73.1°F
Average low is 48.3°F
Temperature data from 1875 to 2022.
Record Precipitation
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1: 0.75" (1957)
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2: 0.73" (1921)
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3: 0.72" (1916)
Precipitation data from 1878 to 2022.