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