S
M
T
W
T
F
S
27
30°
3°
28
29°
5°
29
29°
13°
30
33°
6°
31
39°
4°
1
30°
5°
2
28°
14°
3
35°
15°
4
39°
16°
5
39°
10°
6
37°
15°
7
34°
16°
8
39°
6°
9
37°
7°
10
31°
20°
11
39°
14°
12
40°
14°
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 28° to 40°, with overnight lows between 3° and 20°. The average high for January is 35° 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.
