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