S
M
T
W
T
F
S
29
42°
28°
30
42°
27°
1
41°
28°
2
43°
27°
3
40°
27°
4
32°
15°
5
30°
11°
6
27°
6°
7
22°
13°
8
23°
15°
9
29°
9°
10
27°
6°
11
25°
5°
12
23°
14°
13
25°
20°
14
30°
21°
15
30°
20°
16
31°
19°
17
31°
16°
18
30°
14°
19
30°
14°
20
27°
15°
21
32°
18°
22
34°
18°
23
32°
17°
24
33°
17°
25
30°
15°
26
30°
13°
27
31°
14°
28
27°
14°
29
26°
12°
30
27°
10°
31
25°
13°
1
27°
12°
2
29°
14°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Clear Lake
Clear Lake's December 2026 forecast shows daily high temperatures ranging from 22° to 43°, with overnight lows between 5° and 28°. The average high for December is 30° 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 Clear Lake. See also: January | February | March.
