S
M
T
W
T
F
S
30
83°
53°
31
77°
58°
1
76°
59°
2
76°
59°
3
83°
63°
4
86°
59°
5
84°
52°
6
77°
52°
7
76°
51°
8
75°
53°
9
80°
58°
10
76°
53°
11
74°
48°
12
72°
47°
13
74°
51°
14
73°
48°
15
72°
46°
16
71°
45°
17
70°
45°
18
69°
46°
19
69°
45°
20
70°
45°
21
70°
46°
22
71°
47°
23
72°
51°
24
74°
52°
25
76°
53°
26
76°
44°
27
75°
43°
28
67°
51°
29
67°
48°
30
74°
48°
1
72°
49°
2
69°
46°
3
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mchenry Township
Mchenry Township's September 2026 forecast shows daily high temperatures ranging from 65° to 86°, with overnight lows between 43° and 63°. The average high for September is 74° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Mchenry Township. See also: October | November | December.
