S
M
T
W
T
F
S
30
79°
43°
31
71°
40°
1
65°
42°
2
65°
43°
3
71°
47°
4
75°
50°
5
75°
49°
6
74°
41°
7
64°
40°
8
63°
41°
9
62°
40°
10
63°
45°
11
63°
39°
12
61°
39°
13
61°
46°
14
66°
49°
15
66°
41°
16
61°
37°
17
61°
43°
18
62°
40°
19
69°
36°
20
59°
35°
21
57°
34°
22
57°
33°
23
56°
34°
24
55°
40°
25
57°
39°
26
58°
35°
27
57°
41°
28
56°
33°
29
57°
38°
30
57°
33°
1
55°
36°
2
56°
34°
3
61°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Acme
Acme's September 2026 forecast shows daily high temperatures ranging from 55° to 79°, with overnight lows between 33° and 50°. The average high for September is 63° with an average low of 40°. 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 Acme. See also: October | November | December.