S
M
T
W
T
F
S
27
28°
21°
28
31°
18°
29
36°
19°
30
35°
24°
31
38°
25°
1
37°
13°
2
38°
7°
3
37°
5°
4
21°
4°
5
20°
12°
6
23°
14°
7
34°
8°
8
29°
18°
9
32°
2°
10
33°
0°
11
21°
1°
12
20°
-2°
13
23°
-1°
14
15°
1°
15
17°
8°
16
22°
15°
17
27°
16°
18
33°
10°
19
32°
16°
20
27°
19°
21
33°
18°
22
31°
12°
23
29°
13°
24
26°
11°
25
30°
17°
26
33°
21°
27
32°
18°
28
29°
16°
29
32°
18°
30
Hist. Avg.
28°
10°
31
Hist. Avg.
29°
10°
1
Hist. Avg.
29°
10°
2
Hist. Avg.
29°
10°
3
Hist. Avg.
29°
10°
4
Hist. Avg.
29°
11°
5
Hist. Avg.
30°
11°
6
Hist. Avg.
30°
11°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Decorah
Decorah's January 2027 forecast shows daily high temperatures ranging from 15° to 38°, with overnight lows between -2° and 25°. The average high for January is 29° with an average low of 12°. 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 Decorah. See also: February | March | April.
