S
M
T
W
T
F
S
29
41°
30°
30
42°
31°
1
42°
31°
2
45°
30°
3
44°
28°
4
29°
24°
5
34°
26°
6
46°
24°
7
36°
19°
8
35°
15°
9
30°
13°
10
28°
13°
11
26°
15°
12
28°
16°
13
30°
22°
14
32°
24°
15
36°
24°
16
38°
18°
17
39°
15°
18
38°
15°
19
28°
12°
20
27°
10°
21
28°
12°
22
25°
6°
23
26°
13°
24
30°
18°
25
33°
23°
26
36°
24°
27
39°
21°
28
40°
22°
29
35°
21°
30
35°
20°
31
34°
17°
1
34°
15°
2
30°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mcdonough
Mcdonough's December 2026 forecast shows daily high temperatures ranging from 25° to 46°, with overnight lows between 6° and 31°. The average high for December is 34° with an average low of 20°. 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 Mcdonough. See also: January | February | March.
