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Weather in Islip °F°CAverage monthly temperatures
Jan
1°
-4°

Feb
6°
1°

Mar
6°
0°

Apr
11°
4°

May
20°
12°

Jun
23°
16°

Jul
27°
20°

Aug
28°
21°

Sep
23°
18°

Oct
16°
10°

Nov
9°
3°

Dec
6°
0°

Sunny or mostly sunny days
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