S
M
T
W
T
F
S
29
50°
31°
30
46°
26°
1
39°
22°
2
34°
16°
3
39°
29°
4
42°
27°
5
38°
28°
6
35°
21°
7
33°
17°
8
31°
18°
9
37°
20°
10
39°
27°
11
40°
26°
12
45°
25°
13
41°
27°
14
36°
25°
15
39°
22°
16
40°
22°
17
37°
18°
18
34°
15°
19
35°
10°
20
30°
8°
21
27°
22°
22
36°
18°
23
37°
16°
24
35°
9°
25
31°
14°
26
29°
22°
27
36°
19°
28
37°
16°
29
32°
10°
30
31°
16°
31
30°
6°
1
32°
1°
2
25°
7°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mount Ayr
Mount Ayr's December 2026 forecast shows daily high temperatures ranging from 25° to 50°, with overnight lows between 1° and 31°. The average high for December is 36° with an average low of 19°. 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 Mount Ayr. See also: January | February | March.