Records for Islip Area, New York (ISPthr) on 12-21
Record Highs
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1: 60°F (2018)
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2: 59°F (1973)
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3: 58°F (2012)
Record Lows
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1: 9°F (2004)
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2: 12°F (1983)
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3: 12°F (1963)
Lowest Highs
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1: 53°F (2018)
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2: 46°F (2013)
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3: 45°F (1998)
Highest Lows
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1: 20°F (1963)
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2: 21°F (1989)
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3: 27°F (1975)
Highest December temperature:
77°F on 12-07-1998.
Lowest December temperature:
-1°F on 12-31-1963.
Average temperature is 36.4°F
Average high is 42.5°F
Average low is 30.3°F
Temperature data from 1963 to 2022.
Record Precipitation
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1: 1.81" (1973)
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2: 1.65" (2018)
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3: 1.48" (1977)
Precipitation data from 1963 to 2022.