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