S
M
T
W
T
F
S
29
70°
43°
30
69°
41°
1
67°
34°
2
65°
31°
3
59°
39°
4
56°
32°
5
57°
34°
6
61°
34°
7
62°
41°
8
65°
36°
9
66°
38°
10
55°
31°
11
65°
26°
12
53°
27°
13
52°
27°
14
55°
23°
15
50°
24°
16
50°
26°
17
52°
29°
18
52°
28°
19
53°
32°
20
50°
36°
21
55°
37°
22
58°
39°
23
63°
39°
24
65°
33°
25
66°
34°
26
62°
32°
27
57°
37°
28
Hist. Avg.
57°
35°
29
Hist. Avg.
57°
35°
30
Hist. Avg.
57°
35°
31
Hist. Avg.
57°
35°
1
Hist. Avg.
57°
35°
2
Hist. Avg.
57°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Irmo
Irmo's December 2026 forecast shows daily high temperatures ranging from 50° to 70°, with overnight lows between 23° and 43°. The average high for December is 59° with an average low of 33°. 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 Irmo. See also: January | February | March.
