S
M
T
W
T
F
S
27
34°
13°
28
27°
15°
29
29°
13°
30
27°
8°
31
28°
21°
1
36°
22°
2
39°
16°
3
40°
14°
4
32°
14°
5
26°
19°
6
36°
21°
7
38°
23°
8
40°
8°
9
42°
7°
10
39°
18°
11
32°
10°
12
36°
5°
13
25°
4°
14
22°
0°
15
21°
4°
16
19°
14°
17
27°
12°
18
30°
18°
19
39°
7°
20
39°
5°
21
23°
12°
22
23°
17°
23
34°
17°
24
36°
18°
25
35°
17°
26
36°
19°
27
36°
19°
28
37°
18°
29
40°
19°
30
36°
18°
31
37°
9°
1
Hist. Avg.
30°
10°
2
Hist. Avg.
30°
10°
3
Hist. Avg.
30°
10°
4
Hist. Avg.
30°
10°
5
Hist. Avg.
30°
10°
6
Hist. Avg.
30°
10°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Sullivan
Sullivan's January 2027 forecast shows daily high temperatures ranging from 19° to 42°, with overnight lows between -0° and 23°. The average high for January is 33° with an average low of 14°. 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 Sullivan. See also: February | March | April.
