S
M
T
W
T
F
S
29
48°
33°
30
50°
30°
1
44°
31°
2
42°
24°
3
48°
20°
4
40°
24°
5
37°
31°
6
45°
34°
7
52°
35°
8
53°
35°
9
36°
22°
10
54°
37°
11
Hist. Avg.
44°
26°
12
Hist. Avg.
44°
25°
13
Hist. Avg.
43°
25°
14
Hist. Avg.
43°
25°
15
Hist. Avg.
43°
24°
16
Hist. Avg.
42°
24°
17
Hist. Avg.
42°
24°
18
Hist. Avg.
42°
24°
19
Hist. Avg.
42°
24°
20
Hist. Avg.
42°
24°
21
Hist. Avg.
41°
23°
22
Hist. Avg.
41°
23°
23
Hist. Avg.
41°
23°
24
Hist. Avg.
41°
23°
25
Hist. Avg.
41°
23°
26
Hist. Avg.
41°
23°
27
Hist. Avg.
41°
23°
28
Hist. Avg.
40°
22°
29
Hist. Avg.
40°
22°
30
Hist. Avg.
40°
22°
31
Hist. Avg.
40°
22°
1
Hist. Avg.
40°
22°
2
Hist. Avg.
40°
22°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in St. Peters
St. Peters's December 2026 forecast shows daily high temperatures ranging from 36° to 54°, with overnight lows between 20° and 37°. The average high for December is 46° 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 St. Peters. See also: January | February | March.
