S
M
T
W
T
F
S
29
58°
39°
30
59°
34°
1
55°
29°
2
52°
27°
3
44°
34°
4
49°
33°
5
46°
29°
6
46°
34°
7
50°
31°
8
52°
26°
9
51°
31°
10
45°
26°
11
44°
23°
12
38°
23°
13
38°
20°
14
39°
18°
15
36°
20°
16
34°
20°
17
36°
14°
18
40°
15°
19
34°
19°
20
35°
25°
21
42°
31°
22
44°
30°
23
47°
32°
24
48°
30°
25
50°
29°
26
47°
25°
27
40°
18°
28
37°
29°
29
44°
29°
30
Hist. Avg.
41°
26°
31
Hist. Avg.
41°
26°
1
Hist. Avg.
41°
25°
2
Hist. Avg.
41°
25°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Caldwell
Caldwell's December 2026 forecast shows daily high temperatures ranging from 34° to 59°, with overnight lows between 14° and 39°. The average high for December is 45° 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 Caldwell. See also: January | February | March.
