S
M
T
W
T
F
S
30
92°
66°
31
84°
55°
1
77°
61°
2
89°
53°
3
99°
71°
4
92°
63°
5
96°
69°
6
86°
68°
7
81°
68°
8
84°
56°
9
78°
55°
10
88°
51°
11
94°
62°
12
71°
50°
13
68°
46°
14
75°
52°
15
72°
48°
16
68°
56°
17
71°
63°
18
72°
58°
19
62°
55°
20
65°
53°
21
67°
52°
22
69°
51°
23
71°
52°
24
74°
55°
25
75°
55°
26
75°
54°
27
74°
52°
28
69°
50°
29
61°
51°
30
69°
51°
1
76°
49°
2
63°
51°
3
66°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chamberlain
Chamberlain's September 2026 forecast shows daily high temperatures ranging from 61° to 76°, with overnight lows between 49° and 63°. The average high for September is 69° with an average low of 53°. 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 Chamberlain. See also: October | November | December.
