S
M
T
W
T
F
S
27
69°
51°
28
70°
49°
29
63°
40°
30
61°
40°
1
61°
46°
2
66°
42°
3
69°
47°
4
69°
48°
5
70°
50°
6
70°
51°
7
67°
50°
8
69°
41°
9
68°
46°
10
64°
40°
11
56°
46°
12
57°
47°
13
56°
47°
14
63°
46°
15
59°
47°
16
65°
44°
17
64°
37°
18
63°
34°
19
52°
35°
20
53°
33°
21
50°
42°
22
52°
42°
23
58°
37°
24
57°
33°
25
50°
31°
26
48°
36°
27
50°
39°
28
55°
32°
29
57°
30°
30
52°
29°
31
47°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in McHenry
McHenry's October 2026 forecast shows daily high temperatures ranging from 47° to 70°, with overnight lows between 29° and 51°. The average high for October is 60° with an average low of 41°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in McHenry. See also: November | December | January.
