Islip

The tables below display average monthly climate and weather indicators in Islip New York. Temperature by: Fahrenheit / Centigrade Islip Temperature Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Avg. Temperature 28.6 29.8 38.4 48.3 58.3 67.1 73.2 73.0 66.5 54.6 44.0 34.3 51.3 Avg. Max Temperature 35.9 37.8 45.9 57.1 67.2 75.4 80.8 80.8 72.9 63.4 52.1 41.9 59.3 Avg. Min Temperature 21.3 21.7 30.8 39.5 49.4 58.7 65.7 65.1 60.0 45.7 35.8 26.5 43.4 Days with Max Temp of 90 F or Higher 0.0 0.0 0.0 0.0 1.0 2.0 3.0 1.0 < 0.5 0.0 0.0 0.0 7.0 Days with Min Temp Below Freezing 25.0 21.0 17.0 3.0 0.0 0.0 0.0 0.0 0.0 1.0 10.0 21.0 98.0     Islip Heating and Cooling Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Heating Degree Days 1128 986 825 501 221 24.0 0.0 0.0 51.0 329 630 952 5647 Cooling Degree Days 0.0 0.0 0.0 0.0 14.0 87.0 254 248 96.0 7.0 0.0 0.0 706     Islip Precipitation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precipitation (inches) 3.7 3.5 4.1 4.2 3.9 3.8 3.5 4.0 3.5 3.5 4.2 4.0 46.1 Days with Precipitation 0.01 inch or More 11.0 9.0 10.0 12.0 11.0 9.0 9.0 8.0 9.0 8.0 10.0 11.0 118 Monthly Snowfall (inches) 6.7 5.9 4.4 1.1 < 0.05 0.0 0.0 0.0 0.0 0.0 0.9 3.7 22.7     Other Islip Weather Indicators Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Average Wind Speed 9.6 10.1 10.3 9.8 8.8 8.3 7.5 7.3 7.7 8.2 9.3 9.2 8.8 Avg. Relative Humidity 44.0 68.5 67.0 66.0 65.5 63.5 63.5 66.5 67.0 67.0 63.0 61.5 64.5

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