S
M
T
W
T
F
S
30
78°
45°
31
83°
37°
1
84°
46°
2
76°
45°
3
70°
49°
4
70°
48°
5
77°
46°
6
80°
48°
7
68°
45°
8
72°
36°
9
79°
38°
10
83°
42°
11
78°
42°
12
82°
39°
13
74°
42°
14
65°
40°
15
75°
33°
16
82°
37°
17
66°
51°
18
57°
47°
19
66°
46°
20
71°
40°
21
75°
42°
22
70°
44°
23
74°
44°
24
81°
42°
25
81°
41°
26
67°
36°
27
N/A
28
69°
36°
29
73°
42°
30
74°
37°
1
77°
43°
2
77°
44°
3
77°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Challis
Challis's September 2026 forecast shows daily high temperatures ranging from 69° to 77°, with overnight lows between 36° and 44°. The average high for September is 75° with an average low of 41°. 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 Challis. See also: October | November | December.
