S
M
T
W
T
F
S
30
82°
41°
31
82°
36°
1
77°
31°
2
68°
30°
3
71°
32°
4
76°
39°
5
79°
39°
6
71°
37°
7
76°
28°
8
66°
31°
9
66°
29°
10
68°
35°
11
70°
30°
12
72°
29°
13
66°
38°
14
73°
42°
15
78°
33°
16
72°
28°
17
65°
29°
18
70°
30°
19
74°
31°
20
74°
35°
21
73°
39°
22
73°
39°
23
65°
38°
24
67°
35°
25
68°
38°
26
71°
37°
27
69°
39°
28
70°
38°
29
67°
38°
30
62°
32°
1
60°
28°
2
57°
26°
3
61°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Jackson Hole
Jackson Hole's September 2026 forecast shows daily high temperatures ranging from 57° to 82°, with overnight lows between 26° and 42°. The average high for September is 70° with an average low of 34°. 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 Jackson Hole. See also: October | November | December.
