S
M
T
W
T
F
S
29
36°
23°
30
35°
17°
1
31°
18°
2
28°
22°
3
29°
20°
4
30°
18°
5
31°
16°
6
30°
17°
7
29°
18°
8
30°
19°
9
30°
19°
10
29°
28°
11
33°
31°
12
36°
32°
13
37°
31°
14
38°
31°
15
37°
34°
16
41°
32°
17
42°
23°
18
39°
26°
19
36°
23°
20
33°
19°
21
31°
18°
22
29°
17°
23
28°
22°
24
30°
28°
25
35°
29°
26
36°
31°
27
36°
29°
28
39°
22°
29
35°
21°
30
30°
26°
31
33°
30°
1
Hist. Avg.
34°
24°
2
Hist. Avg.
34°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Trail
Trail's December 2026 forecast shows daily high temperatures ranging from 28° to 42°, with overnight lows between 16° and 34°. The average high for December is 33° with an average low of 24°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Trail. See also: January | February | March.
