S
M
T
W
T
F
S
29
33°
25°
30
36°
17°
1
28°
12°
2
26°
6°
3
25°
3°
4
22°
4°
5
20°
8°
6
22°
10°
7
24°
11°
8
25°
13°
9
26°
9°
10
23°
6°
11
22°
14°
12
26°
12°
13
28°
5°
14
23°
1°
15
19°
-1°
16
15°
12°
17
26°
17°
18
32°
17°
19
32°
16°
20
36°
16°
21
31°
20°
22
35°
15°
23
36°
14°
24
29°
11°
25
26°
12°
26
28°
13°
27
28°
13°
28
30°
12°
29
28°
13°
30
29°
9°
31
28°
6°
1
24°
6°
2
17°
8°
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 15° to 36°, with overnight lows between -1° and 25°. The average high for December is 27° with an average low of 11°. 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.
