S
M
T
W
T
F
S
29
54°
38°
30
55°
38°
1
52°
30°
2
40°
28°
3
43°
30°
4
51°
32°
5
51°
34°
6
40°
26°
7
38°
21°
8
36°
21°
9
37°
24°
10
42°
28°
11
43°
26°
12
47°
28°
13
44°
27°
14
38°
22°
15
40°
24°
16
39°
28°
17
40°
26°
18
38°
19°
19
37°
18°
20
35°
17°
21
33°
18°
22
34°
24°
23
39°
23°
24
36°
24°
25
35°
16°
26
35°
16°
27
34°
17°
28
34°
16°
29
33°
21°
30
34°
19°
31
34°
16°
1
35°
11°
2
33°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Aviston
Aviston's December 2026 forecast shows daily high temperatures ranging from 33° to 55°, with overnight lows between 11° and 38°. The average high for December is 40° with an average low of 23°. 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 Aviston. See also: January | February | March.
