S
M
T
W
T
F
S
29
52°
43°
30
60°
43°
1
59°
42°
2
57°
36°
3
48°
32°
4
52°
35°
5
56°
41°
6
52°
36°
7
47°
33°
8
46°
27°
9
46°
30°
10
47°
30°
11
45°
28°
12
46°
29°
13
48°
26°
14
48°
27°
15
48°
35°
16
49°
36°
17
48°
34°
18
54°
30°
19
51°
26°
20
47°
25°
21
44°
25°
22
46°
27°
23
50°
28°
24
46°
26°
25
45°
25°
26
44°
24°
27
45°
25°
28
44°
25°
29
45°
29°
30
48°
28°
31
49°
25°
1
45°
21°
2
43°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Flat Rock
Flat Rock's December 2026 forecast shows daily high temperatures ranging from 43° to 60°, with overnight lows between 20° and 43°. The average high for December is 49° with an average low of 30°. 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 Flat Rock. See also: January | February | March.
