S
M
T
W
T
F
S
29
62°
36°
30
61°
29°
1
49°
25°
2
50°
29°
3
56°
37°
4
62°
35°
5
50°
28°
6
49°
29°
7
48°
24°
8
46°
23°
9
48°
30°
10
52°
34°
11
55°
33°
12
60°
35°
13
54°
33°
14
52°
25°
15
50°
29°
16
51°
26°
17
50°
22°
18
47°
21°
19
48°
22°
20
45°
21°
21
49°
28°
22
48°
23°
23
47°
25°
24
53°
22°
25
47°
24°
26
52°
27°
27
57°
27°
28
53°
21°
29
48°
25°
30
47°
19°
31
47°
20°
1
46°
23°
2
48°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Idalou
Idalou's December 2026 forecast shows daily high temperatures ranging from 45° to 62°, with overnight lows between 19° and 37°. The average high for December is 51° with an average low of 27°. 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 Idalou. See also: January | February | March.
