S
M
T
W
T
F
S
30
85°
55°
31
86°
56°
1
87°
55°
2
86°
52°
3
84°
51°
4
83°
48°
5
78°
45°
6
76°
46°
7
76°
50°
8
80°
54°
9
83°
54°
10
82°
46°
11
73°
51°
12
75°
51°
13
80°
52°
14
81°
54°
15
82°
52°
16
79°
47°
17
69°
45°
18
72°
48°
19
68°
40°
20
75°
52°
21
76°
43°
22
Hist. Avg.
73°
44°
23
Hist. Avg.
72°
44°
24
Hist. Avg.
72°
43°
25
Hist. Avg.
71°
43°
26
Hist. Avg.
71°
43°
27
Hist. Avg.
70°
43°
28
Hist. Avg.
69°
42°
29
Hist. Avg.
69°
42°
30
Hist. Avg.
68°
42°
1
Hist. Avg.
68°
42°
2
Hist. Avg.
67°
41°
3
Hist. Avg.
66°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Trail
Trail's September 2026 forecast shows daily high temperatures ranging from 68° to 87°, with overnight lows between 40° and 56°. The average high for September is 79° 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.
