S
M
T
W
T
F
S
30
77°
55°
31
77°
55°
1
80°
56°
2
75°
51°
3
76°
51°
4
80°
50°
5
82°
52°
6
83°
54°
7
81°
50°
8
78°
49°
9
81°
53°
10
75°
48°
11
71°
45°
12
70°
46°
13
68°
42°
14
67°
41°
15
68°
41°
16
69°
42°
17
75°
51°
18
67°
48°
19
67°
42°
20
68°
48°
21
68°
42°
22
69°
42°
23
68°
40°
24
70°
42°
25
73°
48°
26
72°
40°
27
62°
36°
28
60°
36°
29
59°
37°
30
58°
38°
1
59°
43°
2
60°
38°
3
62°
43°
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 58° to 83°, with overnight lows between 36° and 56°. The average high for September is 71° 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.
