S
M
T
W
T
F
S
29
44°
33°
30
46°
33°
1
46°
34°
2
45°
32°
3
46°
31°
4
42°
28°
5
43°
31°
6
44°
31°
7
42°
28°
8
35°
27°
9
35°
28°
10
36°
29°
11
35°
29°
12
36°
26°
13
36°
27°
14
34°
21°
15
34°
20°
16
33°
21°
17
35°
25°
18
36°
26°
19
39°
25°
20
38°
18°
21
35°
21°
22
33°
22°
23
30°
18°
24
34°
20°
25
28°
17°
26
29°
14°
27
28°
9°
28
26°
7°
29
27°
4°
30
27°
16°
31
26°
18°
1
37°
13°
2
30°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Constantia
Constantia's December 2026 forecast shows daily high temperatures ranging from 26° to 46°, with overnight lows between 4° and 34°. The average high for December is 36° with an average low of 23°. 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 Constantia. See also: January | February | March.