S
M
T
W
T
F
S
30
82°
57°
31
81°
60°
1
79°
59°
2
82°
53°
3
80°
49°
4
73°
50°
5
73°
58°
6
76°
57°
7
80°
51°
8
73°
50°
9
72°
53°
10
74°
57°
11
72°
56°
12
80°
57°
13
78°
56°
14
79°
55°
15
78°
48°
16
70°
54°
17
70°
47°
18
72°
47°
19
69°
45°
20
67°
43°
21
66°
45°
22
67°
52°
23
69°
45°
24
69°
47°
25
70°
52°
26
72°
52°
27
73°
53°
28
74°
49°
29
73°
46°
30
66°
49°
1
67°
48°
2
72°
49°
3
Hist. Avg.
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Plainfield Charter Township
Plainfield Charter Township's September 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 43° and 60°. The average high for September is 73° with an average low of 51°. 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 Plainfield Charter Township. See also: October | November | December.