S
M
T
W
T
F
S
29
36°
22°
30
42°
18°
1
44°
18°
2
34°
22°
3
40°
16°
4
41°
15°
5
29°
12°
6
27°
12°
7
27°
13°
8
28°
18°
9
32°
23°
10
33°
22°
11
36°
20°
12
32°
19°
13
29°
16°
14
30°
14°
15
30°
8°
16
25°
5°
17
23°
8°
18
23°
20°
19
32°
20°
20
32°
14°
21
35°
14°
22
27°
21°
23
36°
22°
24
36°
17°
25
35°
16°
26
33°
16°
27
33°
17°
28
32°
18°
29
34°
19°
30
35°
20°
31
37°
18°
1
37°
16°
2
35°
14°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Boonville
Boonville's December 2026 forecast shows daily high temperatures ranging from 23° to 44°, with overnight lows between 5° and 23°. The average high for December is 33° with an average low of 17°. 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 Boonville. See also: January | February | March.