S
M
T
W
T
F
S
30
90°
71°
31
91°
70°
1
90°
69°
2
89°
69°
3
88°
68°
4
89°
69°
5
88°
68°
6
89°
69°
7
88°
64°
8
88°
65°
9
86°
65°
10
87°
64°
11
89°
66°
12
88°
65°
13
89°
65°
14
89°
64°
15
88°
60°
16
84°
63°
17
82°
62°
18
86°
62°
19
85°
61°
20
86°
63°
21
85°
62°
22
79°
61°
23
81°
62°
24
83°
62°
25
84°
61°
26
84°
61°
27
83°
60°
28
79°
59°
29
78°
59°
30
76°
58°
1
76°
60°
2
79°
59°
3
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Three Forks
Three Forks's September 2026 forecast shows daily high temperatures ranging from 76° to 91°, with overnight lows between 58° and 71°. The average high for September is 85° with an average low of 64°. 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. See also: October | November | December.
