S
M
T
W
T
F
S
30
84°
64°
31
85°
64°
1
84°
63°
2
84°
60°
3
80°
59°
4
82°
63°
5
85°
62°
6
85°
62°
7
84°
63°
8
86°
63°
9
86°
62°
10
85°
62°
11
84°
61°
12
85°
63°
13
85°
63°
14
81°
51°
15
73°
54°
16
75°
58°
17
74°
54°
18
77°
49°
19
72°
50°
20
73°
49°
21
76°
50°
22
80°
52°
23
80°
49°
24
74°
47°
25
71°
55°
26
77°
55°
27
77°
54°
28
78°
48°
29
69°
45°
30
69°
44°
1
70°
48°
2
77°
49°
3
77°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Washington Township
Washington Township's September 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 44° and 64°. The average high for September is 79° with an average low of 56°. 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 Washington Township. See also: October | November | December.
