S
M
T
W
T
F
S
30
68°
42°
31
77°
29°
1
70°
45°
2
72°
43°
3
71°
41°
4
77°
34°
5
79°
40°
6
79°
36°
7
63°
36°
8
70°
29°
9
72°
30°
10
76°
30°
11
74°
50°
12
78°
41°
13
73°
40°
14
64°
31°
15
71°
34°
16
70°
37°
17
72°
37°
18
71°
39°
19
73°
39°
20
74°
36°
21
68°
35°
22
69°
39°
23
73°
40°
24
72°
42°
25
77°
33°
26
59°
32°
27
67°
36°
28
58°
28°
29
56°
25°
30
57°
31°
1
58°
29°
2
66°
30°
3
59°
23°
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 56° to 78°, with overnight lows between 23° and 42°. The average high for September is 68° 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.
