Records for Islip Area, New York (ISPthr) on 09-21
Record Highs
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1: 84°F (1980)
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2: 82°F (2019)
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3: 82°F (2016)
Record Lows
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1: 43°F (1991)
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2: 43°F (1973)
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3: 44°F (2020)
Lowest Highs
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1: 72°F (1980)
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2: 71°F (1989)
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3: 69°F (2017)
Highest Lows
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1: 59°F (1977)
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2: 62°F (1991)
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3: 62°F (1963)
Highest September temperature:
94°F on 09-03-1973.
Lowest September temperature:
38°F on 09-20-1979.
Average temperature is 64.9°F
Average high is 71.2°F
Average low is 58.6°F
Temperature data from 1963 to 2022.
Record Precipitation
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1: 2.16" (1966)
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2: 0.71" (1979)
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3: 0.66" (1983)
Precipitation data from 1963 to 2022.