S
M
T
W
T
F
S
30
87°
54°
31
90°
54°
1
91°
53°
2
91°
54°
3
90°
53°
4
89°
53°
5
87°
52°
6
84°
52°
7
82°
50°
8
89°
53°
9
90°
52°
10
89°
53°
11
82°
51°
12
89°
52°
13
89°
53°
14
90°
52°
15
88°
49°
16
87°
51°
17
87°
50°
18
79°
51°
19
78°
50°
20
84°
49°
21
80°
49°
22
86°
48°
23
80°
47°
24
77°
43°
25
76°
46°
26
79°
47°
27
82°
47°
28
83°
48°
29
83°
42°
30
82°
46°
1
80°
47°
2
81°
47°
3
81°
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 76° to 91°, with overnight lows between 42° and 54°. The average high for September is 85° with an average low of 50°. 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.
