S
M
T
W
T
F
S
29
38°
19°
30
33°
21°
1
37°
20°
2
33°
22°
3
36°
22°
4
36°
21°
5
38°
20°
6
38°
19°
7
35°
20°
8
37°
19°
9
35°
21°
10
36°
20°
11
36°
18°
12
35°
18°
13
33°
17°
14
34°
17°
15
32°
12°
16
29°
11°
17
28°
4°
18
25°
2°
19
20°
2°
20
19°
-1°
21
16°
2°
22
14°
1°
23
20°
14°
24
29°
12°
25
30°
15°
26
28°
17°
27
32°
16°
28
32°
15°
29
31°
13°
30
29°
1°
31
26°
0°
1
18°
-1°
2
13°
-4°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Jasper
Jasper's December 2026 forecast shows daily high temperatures ranging from 13° to 38°, with overnight lows between -4° and 22°. The average high for December is 30° with an average low of 13°. 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 Jasper. See also: January | February | March.
