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 | -1.9 | -1.2 | 3.6 | 9.1 | 14.6 | 19.5 | 22.9 | 22.8 | 19.2 | 12.6 | 6.7 | 1.3 | 10.7 |
| Avg. Max Temperature | 2.2 | 3.2 | 7.7 | 13.9 | 19.6 | 24.1 | 27.1 | 27.1 | 22.7 | 17.4 | 11.2 | 5.5 | 15.2 |
| Avg. Min Temperature | -5.9 | -5.7 | -0.7 | 4.2 | 9.7 | 14.8 | 18.7 | 18.4 | 15.6 | 7.6 | 2.1 | -3.1 | 6.3 |
| Days with Max Temp of 32 C 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 |
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| 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 |
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| 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 | 3.6 | 4.2 | 4.1 | 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 |
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| 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 |
| Clear Days | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Partly Cloudy Days | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Cloudy Days | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percent of Possible Sunshine | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 |
Weather information for other cities in New York