S
M
T
W
T
F
S
27
42°
26°
28
40°
26°
29
41°
24°
30
40°
28°
31
39°
31°
1
45°
21°
2
49°
16°
3
45°
18°
4
30°
22°
5
33°
22°
6
34°
25°
7
36°
29°
8
43°
26°
9
41°
25°
10
37°
30°
11
43°
33°
12
46°
29°
13
42°
28°
14
38°
30°
15
Hist. Avg.
38°
24°
16
Hist. Avg.
38°
24°
17
Hist. Avg.
38°
23°
18
Hist. Avg.
38°
23°
19
Hist. Avg.
38°
23°
20
Hist. Avg.
38°
23°
21
Hist. Avg.
38°
23°
22
Hist. Avg.
38°
23°
23
Hist. Avg.
38°
23°
24
Hist. Avg.
38°
23°
25
Hist. Avg.
38°
23°
26
Hist. Avg.
38°
23°
27
Hist. Avg.
38°
23°
28
Hist. Avg.
38°
23°
29
Hist. Avg.
38°
23°
30
Hist. Avg.
38°
23°
31
Hist. Avg.
38°
23°
1
Hist. Avg.
39°
23°
2
Hist. Avg.
39°
23°
3
Hist. Avg.
39°
23°
4
Hist. Avg.
39°
23°
5
Hist. Avg.
39°
23°
6
Hist. Avg.
39°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Groton
Groton's January 2027 forecast shows daily high temperatures ranging from 30° to 49°, with overnight lows between 16° and 33°. The average high for January is 40° with an average low of 26°. 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 Groton. See also: February | March | April.
