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Weather in Islip °F°CAverage monthly temperatures
Jan
35°
24°

Feb
44°
34°

Mar
44°
33°

Apr
53°
40°

May
69°
55°

Jun
74°
61°

Jul
82°
68°

Aug
83°
71°

Sep
74°
65°

Oct
62°
51°

Nov
49°
39°

Dec
43°
33°

Sunny or mostly sunny days
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