Records for Islip Area, New York (ISPthr) on 05-18
Record Highs
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1: 89°F (2017)
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2: 89°F (1977)
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3: 84°F (1998)
Record Lows
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1: 38°F (2003)
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2: 41°F (2002)
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3: 41°F (1984)
Lowest Highs
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1: 63°F (1977)
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2: 62°F (2017)
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3: 59°F (1975)
Highest Lows
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1: 49°F (2007)
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2: 53°F (2002)
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3: 56°F (1968)
Highest May temperature:
98°F on 05-20-1996.
Lowest May temperature:
32°F on 05-01-2008.
Average temperature is 58.3°F
Average high is 64.5°F
Average low is 52°F
Temperature data from 1963 to 2022.
Record Precipitation
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1: 1.60" (2002)
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2: 1.38" (2011)
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3: 1.37" (2010)
Precipitation data from 1963 to 2022.