S
M
T
W
T
F
S
29
56°
47°
30
58°
45°
31
52°
33°
1
52°
40°
2
44°
33°
3
39°
31°
4
35°
28°
5
33°
27°
6
31°
22°
7
33°
19°
8
31°
22°
9
35°
22°
10
42°
27°
11
35°
29°
12
42°
26°
13
41°
26°
14
35°
25°
15
32°
22°
16
30°
17°
17
41°
20°
18
44°
33°
19
41°
26°
20
26°
16°
21
19°
11°
22
20°
10°
23
29°
8°
24
33°
12°
25
32°
14°
26
43°
24°
27
39°
21°
28
43°
27°
29
52°
31°
30
37°
24°
31
46°
36°
1
47°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in West Islip
West Islip's January 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for January is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in West Islip. See also: February | March | April.
