S
M
T
W
T
F
S
28
38°
15°
29
47°
33°
30
34°
30°
31
34°
29°
1
39°
22°
2
30°
22°
3
32°
22°
4
35°
27°
5
38°
22°
6
41°
35°
7
44°
36°
8
51°
27°
9
52°
25°
10
51°
40°
11
48°
36°
12
42°
33°
13
45°
36°
14
50°
36°
15
46°
28°
16
36°
23°
17
40°
29°
18
36°
26°
19
35°
29°
20
29°
20°
21
41°
17°
22
47°
37°
23
41°
16°
24
21°
9°
25
24°
10°
26
30°
18°
27
31°
14°
28
30°
15°
29
30°
10°
30
22°
11°
31
32°
3°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in New Haven
New Haven's January 2026 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 New Haven. See also: February | March | April.
