S
M
T
W
T
F
S
30
58°
48°
31
70°
46°
1
70°
48°
2
61°
49°
3
62°
47°
4
67°
41°
5
74°
37°
6
72°
42°
7
N/A
8
74°
53°
9
66°
49°
10
56°
43°
11
57°
38°
12
67°
40°
13
69°
45°
14
66°
40°
15
64°
44°
16
72°
45°
17
72°
45°
18
71°
44°
19
70°
47°
20
68°
45°
21
51°
28°
22
56°
38°
23
57°
36°
24
60°
43°
25
61°
42°
26
60°
40°
27
58°
40°
28
52°
39°
29
52°
35°
30
48°
35°
1
55°
39°
2
59°
37°
3
57°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Fort Nelson
Fort Nelson's September 2026 forecast shows daily high temperatures ranging from 48° to 74°, with overnight lows between 28° and 53°. The average high for September is 61° 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 Fort Nelson. See also: October | November | December.