S
M
T
W
T
F
S
30
82°
60°
31
81°
58°
1
81°
54°
2
79°
45°
3
80°
49°
4
80°
51°
5
81°
49°
6
75°
54°
7
72°
47°
8
78°
47°
9
81°
46°
10
82°
47°
11
83°
50°
12
80°
47°
13
77°
45°
14
76°
44°
15
82°
38°
16
83°
47°
17
82°
44°
18
74°
39°
19
70°
33°
20
69°
33°
21
70°
34°
22
75°
33°
23
80°
44°
24
74°
34°
25
67°
31°
26
67°
31°
27
70°
32°
28
75°
33°
29
77°
31°
30
76°
32°
1
75°
31°
2
75°
36°
3
76°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Three Forks Campground
Three Forks Campground's September 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 31° and 54°. The average high for September is 76° with an average low of 40°. 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 Three Forks Campground. See also: October | November | December.