Records for Islip Area, New York (ISPthr) on 12-31
Record Highs
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1: 59°F (1992)
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2: 59°F (1965)
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3: 56°F (2011)
Record Lows
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1: -1°F (1963)
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2: 9°F (2017)
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3: 12°F (1993)
Lowest Highs
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1: 47°F (1965)
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2: 45°F (2021)
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3: 44°F (1992)
Highest Lows
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1: 19°F (2017)
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2: 22°F (1976)
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3: 27°F (1998)
Highest December temperature:
77°F on 12-07-1998.
Lowest December temperature:
-1°F on 12-31-1963.
Average temperature is 34.4°F
Average high is 40.6°F
Average low is 28.2°F
Temperature data from 1963 to 2022.
Record Precipitation
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1: 1.26" (2018)
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2: 0.67" (1989)
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3: 0.54" (1973)
Precipitation data from 1963 to 2022.