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
| 13 September 2026 Sun 18.9 ° C ( 66°F )  Cloudy |
Feels Like : 17.5 ° C / 63.5°F Humidity : % 83 Pressure : 1017 mb Wind Speed : 17.3 kmph / 10.7 miles from SSE 
Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 78 |
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 |
|---|---|---|---|---|---|---|---|
| 13 September 2026 Sun |  Patchy rain nearby |
18.9 ° C | 24.8 ° C | 21.8 ° C | % 89 | 17.3 km/h | 88% |
| 14 September 2026 Mon |  Sunny |
18.2 ° C | 23.1 ° C | 21.2 ° C | % 61 | 25.9 km/h | 36% |
| 15 September 2026 Tue | Sunny |
15.2 ° C | 20.5 ° C | 17.9 ° C | % 61 | 18 km/h | 5% |
| 16 September 2026 Wed | Sunny |
17.3 ° C | 21.6 ° C | 19.3 ° C | % 64 | 12.2 km/h | 7% |
| 17 September 2026 Thu | Sunny |
19.4 ° C | 22.6 ° C | 20.9 ° C | % 63 | 15.8 km/h | 5% |
| 18 September 2026 Fri |  Partly Cloudy |
17.7 ° C | 24.9 ° C | 22 ° C | % 85 | 23.4 km/h | 78% |
| 19 September 2026 Sat |  Light rain shower |
13.6 ° C | 17.2 ° C | 14.7 ° C | % 91 | 36 km/h | 92% |
| 20 September 2026 Sun | Sunny |
12.9 ° C | 19.7 ° C | 15.6 ° C | % 62 | 25.2 km/h | 10% |
| 21 September 2026 Mon | Sunny |
14.2 ° C | 18.5 ° C | 16 ° C | % 61 | 26.6 km/h | 4% |
| 22 September 2026 Tue | Patchy rain nearby |
13.8 ° C | 18 ° C | 15.8 ° C | % 67 | 24.8 km/h | 17% |
| 23 September 2026 Wed | Patchy rain nearby |
14.5 ° C | 17.4 ° C | 15.9 ° C | % 75 | 26.6 km/h | 30% |
| 24 September 2026 Thu |  Overcast |
14.4 ° C | 19.8 ° C | 16.6 ° C | % 72 | 18 km/h | 16% |
| 25 September 2026 Fri | Overcast |
14.2 ° C | 18.3 ° C | 16.2 ° C | % 64 | 22.3 km/h | 8% |
| 26 September 2026 Sat | Sunny |
13.1 ° C | 23.5 ° C | 18.3 ° C | % 59 | 31.3 km/h | 5% |
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