S
M
T
W
T
F
S
27
38°
16°
28
28°
25°
29
32°
17°
30
35°
27°
31
32°
27°
1
37°
29°
2
37°
22°
3
38°
22°
4
33°
17°
5
33°
18°
6
32°
17°
7
33°
18°
8
32°
19°
9
32°
20°
10
34°
20°
11
36°
18°
12
35°
18°
13
32°
19°
14
34°
19°
15
34°
20°
16
37°
21°
17
37°
21°
18
35°
23°
19
36°
28°
20
38°
30°
21
37°
30°
22
38°
29°
23
39°
27°
24
40°
26°
25
38°
28°
26
40°
31°
27
38°
31°
28
41°
32°
29
41°
29°
30
42°
31°
31
Hist. Avg.
41°
27°
1
Hist. Avg.
42°
27°
2
Hist. Avg.
42°
27°
3
Hist. Avg.
42°
27°
4
Hist. Avg.
42°
27°
5
Hist. Avg.
43°
27°
6
Hist. Avg.
43°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Boise
Boise's January 2027 forecast shows daily high temperatures ranging from 28° to 42°, with overnight lows between 16° and 32°. The average high for January is 36° with an average low of 24°. 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 Boise. See also: February | March | April.
