S
M
T
W
T
F
S
29
35°
21°
30
35°
21°
1
36°
28°
2
38°
31°
3
40°
26°
4
39°
23°
5
40°
22°
6
39°
24°
7
37°
25°
8
36°
27°
9
38°
26°
10
37°
19°
11
37°
19°
12
38°
20°
13
40°
24°
14
37°
27°
15
45°
25°
16
41°
31°
17
37°
28°
18
39°
27°
19
44°
29°
20
38°
26°
21
38°
27°
22
39°
28°
23
39°
24°
24
38°
23°
25
35°
18°
26
36°
17°
27
29°
17°
28
28°
19°
29
30°
16°
30
30°
21°
31
31°
27°
1
34°
24°
2
36°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Kittitas
Kittitas's December 2026 forecast shows daily high temperatures ranging from 28° to 45°, with overnight lows between 16° and 31°. The average high for December is 37° with an average low of 24°. 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 Kittitas. See also: January | February | March.
