S
M
T
W
T
F
S
30
67°
45°
31
65°
46°
1
66°
47°
2
67°
47°
3
67°
51°
4
66°
49°
5
65°
46°
6
64°
49°
7
64°
45°
8
65°
43°
9
68°
47°
10
69°
44°
11
63°
44°
12
70°
43°
13
69°
50°
14
70°
50°
15
64°
49°
16
70°
50°
17
69°
50°
18
69°
49°
19
70°
48°
20
70°
47°
21
64°
47°
22
59°
44°
23
62°
39°
24
60°
40°
25
56°
39°
26
61°
37°
27
61°
37°
28
54°
38°
29
53°
38°
30
53°
35°
1
Hist. Avg.
56°
40°
2
Hist. Avg.
56°
40°
3
Hist. Avg.
56°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chisholm
Chisholm's September 2026 forecast shows daily high temperatures ranging from 53° to 70°, with overnight lows between 35° and 51°. The average high for September is 64° with an average low of 45°. 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 Chisholm. See also: October | November | December.