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Weather in Islip °F°CAverage monthly temperatures
Jan
35°
24°
18 days
Feb
44°
34°
11 days
Mar
44°
33°
16 days
Apr
53°
40°
13 days
May
69°
55°
13 days
Jun
74°
61°
16 days
Jul
82°
68°
22 days
Aug
83°
71°
18 days
Sep
74°
65°
8 days
Oct
62°
51°
11 days
Nov
49°
39°
12 days
Dec
43°
33°
18 days
Sunny or mostly sunny days
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