S
M
T
W
T
F
S
30
88°
48°
31
92°
51°
1
75°
54°
2
60°
52°
3
66°
51°
4
68°
48°
5
75°
48°
6
68°
53°
7
80°
46°
8
90°
50°
9
96°
53°
10
94°
56°
11
87°
53°
12
73°
47°
13
71°
51°
14
80°
42°
15
82°
47°
16
82°
45°
17
76°
51°
18
83°
50°
19
88°
50°
20
89°
53°
21
82°
52°
22
81°
43°
23
83°
46°
24
88°
48°
25
79°
44°
26
81°
46°
27
81°
49°
28
80°
47°
29
80°
46°
30
79°
42°
1
73°
40°
2
74°
41°
3
73°
40°
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 73° to 89°, with overnight lows between 40° and 53°. The average high for September is 81° 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.
