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