Records for Islip Area, New York (ISPthr) on 12-20
Record Highs
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1: 58°F (2002)
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2: 58°F (1999)
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3: 56°F (1973)
Record Lows
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1: 7°F (1963)
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2: 8°F (1985)
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3: 9°F (1975)
Lowest Highs
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1: 42°F (1998)
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2: 41°F (2002)
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3: 40°F (1971)
Highest Lows
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1: 22°F (1983)
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2: 24°F (2004)
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3: 24°F (1963)
Highest December temperature:
77°F on 12-07-1998.
Lowest December temperature:
-1°F on 12-31-1963.
Average temperature is 36.6°F
Average high is 42.7°F
Average low is 30.5°F
Temperature data from 1963 to 2022.
Record Precipitation
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1: 1.34" (1995)
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2: 1.25" (2009)
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3: 1.21" (2002)
Precipitation data from 1963 to 2022.