S
M
T
W
T
F
S
27
36°
20°
28
33°
20°
29
37°
19°
30
36°
24°
31
37°
29°
1
49°
23°
2
47°
18°
3
44°
18°
4
32°
21°
5
35°
27°
6
44°
29°
7
46°
27°
8
50°
11°
9
49°
13°
10
31°
23°
11
39°
18°
12
40°
15°
13
32°
15°
14
32°
11°
15
31°
12°
16
28°
20°
17
36°
23°
18
36°
25°
19
48°
13°
20
46°
13°
21
29°
20°
22
33°
25°
23
41°
27°
24
45°
28°
25
44°
28°
26
46°
27°
27
47°
28°
28
46°
26°
29
49°
26°
30
44°
24°
31
38°
18°
1
49°
16°
2
Hist. Avg.
40°
20°
3
Hist. Avg.
40°
20°
4
Hist. Avg.
40°
20°
5
Hist. Avg.
41°
20°
6
Hist. Avg.
41°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Dedham
Dedham's January 2027 forecast shows daily high temperatures ranging from 28° to 50°, with overnight lows between 11° and 29°. The average high for January is 40° with an average low of 21°. 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 Dedham. See also: February | March | April.