S
M
T
W
T
F
S
27
48°
23°
28
34°
26°
29
33°
31°
30
42°
31°
31
44°
32°
1
45°
34°
2
47°
31°
3
48°
30°
4
46°
19°
5
38°
18°
6
30°
21°
7
30°
29°
8
43°
25°
9
44°
23°
10
32°
25°
11
34°
16°
12
35°
16°
13
26°
14°
14
29°
13°
15
27°
19°
16
29°
20°
17
35°
15°
18
29°
16°
19
29°
12°
20
31°
16°
21
26°
26°
22
37°
28°
23
44°
23°
24
44°
23°
25
32°
26°
26
33°
27°
27
38°
28°
28
Hist. Avg.
36°
22°
29
Hist. Avg.
36°
22°
30
Hist. Avg.
37°
22°
31
Hist. Avg.
37°
22°
1
Hist. Avg.
37°
23°
2
Hist. Avg.
37°
23°
3
Hist. Avg.
37°
23°
4
Hist. Avg.
37°
23°
5
Hist. Avg.
37°
23°
6
Hist. Avg.
38°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Boston
Boston's January 2027 forecast shows daily high temperatures ranging from 26° to 48°, with overnight lows between 12° and 34°. The average high for January is 36° 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 Boston. See also: February | March | April.
