S
M
T
W
T
F
S
29
38°
20°
30
40°
21°
1
40°
21°
2
38°
19°
3
34°
22°
4
38°
22°
5
39°
23°
6
38°
14°
7
38°
10°
8
27°
17°
9
28°
18°
10
33°
17°
11
34°
18°
12
29°
18°
13
32°
19°
14
33°
14°
15
33°
10°
16
29°
14°
17
28°
8°
18
28°
15°
19
27°
17°
20
32°
16°
21
32°
16°
22
31°
13°
23
31°
4°
24
23°
12°
25
25°
13°
26
29°
15°
27
31°
12°
28
28°
6°
29
22°
9°
30
23°
1°
31
27°
-4°
1
30°
-4°
2
12°
-1°
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 12° to 40°, with overnight lows between -4° and 23°. The average high for December is 31° 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.
