Records for Islip Area, New York (ISPthr) on 12-19
Record Highs
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1: 55°F (2017)
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2: 54°F (1997)
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3: 53°F (1990)
Record Lows
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1: 9°F (1989)
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2: 12°F (1991)
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3: 12°F (1964)
Lowest Highs
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1: 40°F (2017)
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2: 40°F (2001)
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3: 38°F (2012)
Highest Lows
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1: 25°F (2019)
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2: 25°F (1973)
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3: 26°F (1991)
Highest December temperature:
77°F on 12-07-1998.
Lowest December temperature:
-1°F on 12-31-1963.
Average temperature is 36.8°F
Average high is 42.9°F
Average low is 30.8°F
Temperature data from 1963 to 2022.
Record Precipitation
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1: 0.92" (1996)
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2: 0.84" (2009)
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3: 0.67" (2008)
Precipitation data from 1963 to 2022.