Long Island MacArthur Airport (ISP) 15 Day Weather Forecast, Islip United States
Current weather conditions and 15 day weather forecast for Long Island MacArthur Airport in Islip, United States including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at ISP
| 14 December 2025 Sun 1.1 ° C ( 34°F )  Patchy light snow |
Feels Like : -2 ° C / 28.4°F Humidity : % 92 Pressure : 1016 mb Wind Speed : 10.1 kmph / 6.3 miles from WSW 
Visibility : 3.2 km Precipitation (rainfall) : 0.73 mm Cloud (%) : 100 |
15-day weather forecast for Long Island MacArthur Airport, Islip, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 14 December 2025 Sun |  Moderate snow |
-5.4 ° C | 0.5 ° C | -1.3 ° C | % 79 | 31.3 km/h | 63% |
| 15 December 2025 Mon |  Partly Cloudy |
-7.2 ° C | -1.3 ° C | -4.1 ° C | % 66 | 31.3 km/h | 0% |
| 16 December 2025 Tue |  Sunny |
-4.5 ° C | 2.8 ° C | -1.3 ° C | % 70 | 24.5 km/h | 0% |
| 17 December 2025 Wed | Sunny |
0.3 ° C | 5.6 ° C | 4.1 ° C | % 76 | 31.3 km/h | 0% |
| 18 December 2025 Thu |  Patchy rain nearby |
0.6 ° C | 6.5 ° C | 3.7 ° C | % 71 | 31.7 km/h | 54% |
| 19 December 2025 Fri |  Moderate rain |
0.6 ° C | 9.7 ° C | 6.3 ° C | % 65 | 38.2 km/h | 82% |
| 20 December 2025 Sat | Partly Cloudy |
-0.1 ° C | 5.2 ° C | 3.2 ° C | % 60 | 32.8 km/h | 0% |
| 21 December 2025 Sun | Patchy rain nearby |
0 ° C | 9.4 ° C | 6.5 ° C | % 77 | 29.2 km/h | 89% |
| 22 December 2025 Mon | Sunny |
-1.3 ° C | 1.8 ° C | 0.5 ° C | % 38 | 24.1 km/h | 0% |
| 23 December 2025 Tue | Patchy rain nearby |
3.2 ° C | 9.6 ° C | 7.6 ° C | % 80 | 32.4 km/h | 85% |
| 24 December 2025 Wed |  Overcast |
4.8 ° C | 6.1 ° C | 5.9 ° C | % 66 | 20.2 km/h | 0% |
| 25 December 2025 Thu | Patchy rain nearby |
0.6 ° C | 1.7 ° C | 1.4 ° C | % 77 | 15.1 km/h | 88% |
| 26 December 2025 Fri |  Patchy moderate snow |
-1.4 ° C | 0.1 ° C | -0.4 ° C | % 52 | 20.2 km/h | 73% |
| 27 December 2025 Sat |  Blizzard |
-1 ° C | 0.9 ° C | 0.1 ° C | % 86 | 31.3 km/h | 66% |
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