S
M
T
W
T
F
S
30
64°
36°
31
72°
42°
1
77°
39°
2
73°
37°
3
72°
35°
4
61°
32°
5
67°
33°
6
66°
34°
7
71°
37°
8
70°
38°
9
72°
33°
10
75°
40°
11
73°
30°
12
64°
33°
13
70°
35°
14
62°
27°
15
62°
32°
16
70°
36°
17
72°
38°
18
72°
31°
19
60°
26°
20
56°
26°
21
57°
25°
22
56°
23°
23
58°
24°
24
60°
30°
25
67°
35°
26
69°
36°
27
65°
33°
28
56°
30°
29
55°
29°
30
57°
29°
1
57°
32°
2
60°
29°
3
53°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fossil Forest
Fossil Forest's September 2026 forecast shows daily high temperatures ranging from 53° to 77°, with overnight lows between 23° and 42°. The average high for September is 65° with an average low of 32°. 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 Fossil Forest. See also: October | November | December.
