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
| 11 September 2026 Fri 22.1 ° C ( 71.8°F )  Overcast |
Feels Like : 21.5 ° C / 70.7°F Humidity : % 58 Pressure : 1016 mb Wind Speed : 8.6 kmph / 5.4 miles from N 
Visibility : 10 km Precipitation (rainfall) : 0 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 |
|---|---|---|---|---|---|---|---|
| 11 September 2026 Fri | Overcast |
18.8 ° C | 28.8 ° C | 22.6 ° C | % 60 | 11.5 km/h | 7% |
| 12 September 2026 Sat | Overcast |
18.2 ° C | 23.4 ° C | 21.4 ° C | % 61 | 15.1 km/h | 11% |
| 13 September 2026 Sun |  Light rain shower |
20.4 ° C | 25.7 ° C | 23.1 ° C | % 87 | 16.9 km/h | 89% |
| 14 September 2026 Mon |  Sunny |
20.5 ° C | 26 ° C | 23.5 ° C | % 61 | 21.6 km/h | 6% |
| 15 September 2026 Tue | Sunny |
17 ° C | 21.9 ° C | 18.9 ° C | % 60 | 18 km/h | 6% |
| 16 September 2026 Wed | Sunny |
16.9 ° C | 24.1 ° C | 21.3 ° C | % 69 | 22.7 km/h | 6% |
| 17 September 2026 Thu | Sunny |
22.1 ° C | 25.2 ° C | 23.3 ° C | % 80 | 29.9 km/h | 57% |
| 18 September 2026 Fri | Light rain shower |
16.8 ° C | 22 ° C | 19.1 ° C | % 82 | 24.5 km/h | 85% |
| 19 September 2026 Sat | Sunny |
15.3 ° C | 19.3 ° C | 17.5 ° C | % 69 | 9.7 km/h | 9% |
| 20 September 2026 Sun | Overcast |
16.5 ° C | 21 ° C | 18.5 ° C | % 65 | 15.1 km/h | 13% |
| 21 September 2026 Mon | Overcast |
16.4 ° C | 19.3 ° C | 18.1 ° C | % 66 | 29.5 km/h | 16% |
| 22 September 2026 Tue | Light rain shower |
14.8 ° C | 18.1 ° C | 16.3 ° C | % 88 | 50 km/h | 91% |
| 23 September 2026 Wed | Light rain shower |
14.4 ° C | 17.8 ° C | 16.3 ° C | % 88 | 34.6 km/h | 86% |
| 24 September 2026 Thu | Overcast |
15.8 ° C | 22.8 ° C | 19 ° C | % 67 | 22.7 km/h | 13% |
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