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
81°
47°
23
75°
43°
24
73°
53°
25
64°
46°
26
62°
42°
27
64°
42°
28
65°
44°
29
62°
45°
30
63°
43°
1
65°
43°
2
66°
41°
3
63°
41°
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 62° to 81°, with overnight lows between 41° and 53°. The average high for September is 67° with an average low of 44°. 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.
