S
M
T
W
T
F
S
27
34°
18°
28
35°
15°
29
34°
20°
30
37°
27°
31
44°
21°
1
46°
17°
2
34°
14°
3
31°
17°
4
34°
21°
5
39°
30°
6
45°
32°
7
50°
18°
8
51°
14°
9
34°
16°
10
32°
17°
11
36°
13°
12
33°
12°
13
32°
13°
14
32°
13°
15
33°
14°
16
34°
21°
17
42°
22°
18
41°
16°
19
46°
14°
20
31°
16°
21
33°
21°
22
40°
29°
23
42°
32°
24
45°
35°
25
50°
33°
26
51°
32°
27
49°
28°
28
45°
24°
29
40°
22°
30
36°
17°
31
41°
12°
1
38°
14°
2
Hist. Avg.
42°
24°
3
Hist. Avg.
42°
24°
4
Hist. Avg.
42°
24°
5
Hist. Avg.
43°
24°
6
Hist. Avg.
43°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Gary
Gary's January 2027 forecast shows daily high temperatures ranging from 31° to 51°, with overnight lows between 12° and 35°. The average high for January is 39° with an average low of 20°. 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 Gary. See also: February | March | April.
