S
M
T
W
T
F
S
27
49°
25°
28
38°
27°
29
37°
32°
30
46°
31°
31
46°
34°
1
48°
36°
2
49°
31°
3
50°
28°
4
46°
22°
5
37°
19°
6
33°
22°
7
32°
27°
8
46°
26°
9
45°
24°
10
36°
21°
11
36°
16°
12
35°
18°
13
29°
17°
14
32°
16°
15
29°
19°
16
29°
18°
17
34°
17°
18
30°
18°
19
32°
13°
20
33°
17°
21
29°
29°
22
40°
29°
23
46°
23°
24
45°
21°
25
34°
24°
26
35°
24°
27
41°
26°
28
39°
30°
29
Hist. Avg.
39°
24°
30
Hist. Avg.
39°
24°
31
Hist. Avg.
39°
24°
1
Hist. Avg.
39°
24°
2
Hist. Avg.
39°
24°
3
Hist. Avg.
39°
24°
4
Hist. Avg.
39°
24°
5
Hist. Avg.
39°
24°
6
Hist. Avg.
40°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Central Islip
Central Islip's January 2027 forecast shows daily high temperatures ranging from 29° to 50°, with overnight lows between 13° and 36°. The average high for January is 38° with an average low of 24°. 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 Central Islip. See also: February | March | April.
