S
M
T
W
T
F
S
29
44°
26°
30
46°
32°
1
49°
38°
2
49°
35°
3
53°
35°
4
53°
34°
5
51°
30°
6
42°
26°
7
42°
35°
8
53°
37°
9
50°
37°
10
48°
38°
11
51°
37°
12
50°
33°
13
43°
29°
14
41°
26°
15
38°
25°
16
38°
25°
17
39°
28°
18
44°
35°
19
52°
35°
20
49°
34°
21
52°
30°
22
39°
28°
23
42°
34°
24
51°
35°
25
38°
22°
26
38°
22°
27
40°
28°
28
39°
32°
29
52°
27°
30
45°
23°
31
39°
23°
1
39°
21°
2
38°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Countryside
Countryside's December 2026 forecast shows daily high temperatures ranging from 38° to 53°, with overnight lows between 19° and 38°. The average high for December is 45° 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 Countryside. See also: January | February | March.
