S
M
T
W
T
F
S
29
48°
32°
30
43°
31°
1
43°
33°
2
47°
23°
3
45°
19°
4
40°
17°
5
33°
18°
6
32°
17°
7
33°
15°
8
34°
13°
9
33°
12°
10
28°
14°
11
28°
15°
12
30°
15°
13
31°
17°
14
32°
21°
15
35°
24°
16
37°
23°
17
39°
26°
18
39°
28°
19
38°
26°
20
40°
24°
21
38°
23°
22
36°
27°
23
37°
19°
24
38°
18°
25
32°
21°
26
34°
19°
27
34°
21°
28
33°
20°
29
36°
22°
30
31°
8°
31
32°
23°
1
34°
22°
2
Hist. Avg.
34°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Peoria
Peoria's December 2026 forecast shows daily high temperatures ranging from 28° to 48°, with overnight lows between 8° and 33°. The average high for December is 36° with an average low of 21°. 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 Peoria. See also: January | February | March.
