Islip New York Climate Data

Monthly Average Climate Data for Islip New York

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-3.8 °C4.1 °C99.06 mm
February-3.2 °C5.1 °C87.88 mm
March0.1 °C8.7 °C124.71 mm
April5.3 °C14.7 °C109.22 mm
May10.6 °C20.1 °C95.25 mm
June16.1 °C25.2 °C107.19 mm
July19.6 °C28.2 °C86.11 mm
August18.9 °C27.8 °C105.16 mm
September15.3 °C23.7 °C99.57 mm
October9.2 °C17.6 °C123.44 mm
November3.7 °C12.2 °C94.49 mm
December-0.5 °C7.1 °C124.46 mm
Annual7.6 °C16.2 °C1256.54 mm

Climate Data for Islip New York

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : -15°C to -12.2°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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