S
M
T
W
T
F
S
30
68°
42°
31
63°
43°
1
59°
44°
2
64°
41°
3
63°
38°
4
63°
47°
5
67°
48°
6
61°
43°
7
58°
46°
8
Hist. Avg.
60°
42°
9
Hist. Avg.
59°
41°
10
Hist. Avg.
59°
41°
11
Hist. Avg.
58°
41°
12
Hist. Avg.
58°
41°
13
Hist. Avg.
57°
40°
14
Hist. Avg.
57°
40°
15
Hist. Avg.
57°
40°
16
Hist. Avg.
56°
39°
17
Hist. Avg.
56°
39°
18
Hist. Avg.
55°
39°
19
Hist. Avg.
55°
39°
20
Hist. Avg.
54°
38°
21
Hist. Avg.
54°
38°
22
Hist. Avg.
53°
38°
23
Hist. Avg.
53°
37°
24
Hist. Avg.
52°
37°
25
Hist. Avg.
52°
37°
26
Hist. Avg.
52°
36°
27
Hist. Avg.
51°
36°
28
Hist. Avg.
51°
36°
29
Hist. Avg.
50°
35°
30
Hist. Avg.
50°
35°
1
Hist. Avg.
49°
35°
2
Hist. Avg.
49°
35°
3
Hist. Avg.
48°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Chapais
Chapais's September 2026 forecast shows daily high temperatures ranging from 58° to 68°, with overnight lows between 38° and 48°. The average high for September is 63° with an average low of 44°. 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 Chapais. See also: October | November | December.