S
M
T
W
T
F
S
30
75°
40°
31
71°
40°
1
73°
39°
2
76°
47°
3
81°
44°
4
81°
44°
5
78°
42°
6
68°
37°
7
72°
45°
8
71°
41°
9
70°
42°
10
68°
44°
11
67°
40°
12
67°
41°
13
68°
34°
14
67°
40°
15
71°
41°
16
74°
41°
17
72°
40°
18
67°
39°
19
66°
44°
20
75°
45°
21
74°
41°
22
69°
42°
23
66°
39°
24
74°
41°
25
74°
36°
26
62°
36°
27
58°
39°
28
61°
40°
29
62°
39°
30
63°
38°
1
61°
43°
2
68°
40°
3
58°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fortine
Fortine's September 2026 forecast shows daily high temperatures ranging from 58° to 81°, with overnight lows between 34° and 47°. The average high for September is 69° with an average low of 41°. 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 Fortine. See also: October | November | December.