S
M
T
W
T
F
S
30
76°
43°
31
74°
43°
1
73°
42°
2
66°
42°
3
65°
39°
4
67°
40°
5
72°
42°
6
63°
37°
7
62°
30°
8
63°
32°
9
65°
34°
10
70°
38°
11
70°
39°
12
71°
38°
13
69°
38°
14
67°
35°
15
64°
38°
16
66°
38°
17
64°
39°
18
63°
35°
19
67°
38°
20
69°
37°
21
66°
37°
22
66°
36°
23
69°
37°
24
70°
38°
25
68°
37°
26
66°
39°
27
65°
37°
28
67°
36°
29
67°
29°
30
57°
38°
1
61°
36°
2
54°
25°
3
53°
34°
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 53° to 76°, with overnight lows between 25° and 43°. The average high for September is 66° with an average low of 37°. 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.
