S
M
T
W
T
F
S
29
35°
19°
30
31°
16°
1
23°
14°
2
28°
19°
3
34°
19°
4
33°
18°
5
32°
17°
6
29°
15°
7
21°
13°
8
28°
16°
9
32°
17°
10
33°
16°
11
32°
16°
12
32°
15°
13
31°
16°
14
19°
11°
15
24°
12°
16
27°
10°
17
28°
6°
18
27°
2°
19
19°
-4°
20
15°
0°
21
13°
9°
22
27°
6°
23
27°
3°
24
22°
6°
25
22°
8°
26
25°
8°
27
26°
6°
28
26°
2°
29
22°
4°
30
18°
-6°
31
20°
-11°
1
14°
-5°
2
10°
4°
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 10° to 35°, with overnight lows between -11° and 19°. The average high for December is 25° with an average low of 9°. 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.
