S
M
T
W
T
F
S
27
49°
24°
28
36°
25°
29
37°
31°
30
45°
30°
31
45°
32°
1
47°
34°
2
49°
31°
3
50°
28°
4
47°
20°
5
39°
18°
6
33°
21°
7
32°
27°
8
45°
25°
9
45°
23°
10
35°
23°
11
36°
16°
12
36°
17°
13
28°
15°
14
32°
15°
15
30°
19°
16
30°
18°
17
35°
16°
18
30°
16°
19
32°
13°
20
33°
17°
21
29°
27°
22
39°
28°
23
46°
21°
24
45°
20°
25
33°
24°
26
34°
25°
27
42°
26°
28
40°
30°
29
Hist. Avg.
38°
19°
30
Hist. Avg.
38°
19°
31
Hist. Avg.
38°
19°
1
Hist. Avg.
38°
19°
2
Hist. Avg.
38°
19°
3
Hist. Avg.
38°
19°
4
Hist. Avg.
38°
19°
5
Hist. Avg.
38°
19°
6
Hist. Avg.
38°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Sag Harbor
Sag Harbor's January 2027 forecast shows daily high temperatures ranging from 28° to 50°, with overnight lows between 13° and 34°. The average high for January is 38° with an average low of 23°. 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 Sag Harbor. See also: February | March | April.
