S
M
T
W
T
F
S
30
71°
49°
31
81°
53°
1
80°
55°
2
64°
52°
3
69°
50°
4
66°
48°
5
75°
47°
6
72°
49°
7
64°
53°
8
77°
53°
9
81°
49°
10
82°
54°
11
77°
46°
12
79°
47°
13
62°
50°
14
61°
49°
15
65°
50°
16
71°
50°
17
74°
46°
18
79°
43°
19
81°
46°
20
83°
46°
21
85°
47°
22
82°
47°
23
75°
46°
24
71°
44°
25
57°
50°
26
58°
40°
27
61°
35°
28
68°
32°
29
55°
50°
30
66°
44°
1
60°
44°
2
72°
47°
3
74°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Trail
Trail's September 2026 forecast shows daily high temperatures ranging from 72° to 74°, with overnight lows between 45° and 47°. The average high for September is 73° with an average low of 46°. 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 Trail. See also: October | November | December.
