S
M
T
W
T
F
S
29
36°
24°
30
35°
25°
1
37°
28°
2
38°
34°
3
41°
36°
4
43°
37°
5
45°
33°
6
45°
28°
7
41°
31°
8
39°
32°
9
46°
35°
10
40°
27°
11
38°
25°
12
Hist. Avg.
41°
30°
13
Hist. Avg.
41°
30°
14
Hist. Avg.
41°
30°
15
Hist. Avg.
40°
30°
16
Hist. Avg.
40°
30°
17
Hist. Avg.
40°
30°
18
Hist. Avg.
40°
30°
19
Hist. Avg.
40°
30°
20
Hist. Avg.
40°
30°
21
Hist. Avg.
40°
29°
22
Hist. Avg.
40°
29°
23
Hist. Avg.
40°
29°
24
Hist. Avg.
40°
29°
25
Hist. Avg.
40°
29°
26
Hist. Avg.
40°
29°
27
Hist. Avg.
40°
29°
28
Hist. Avg.
40°
29°
29
Hist. Avg.
40°
29°
30
Hist. Avg.
40°
29°
31
Hist. Avg.
40°
29°
1
Hist. Avg.
41°
30°
2
Hist. Avg.
41°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Walla Walla
Walla Walla's December 2026 forecast shows daily high temperatures ranging from 35° to 46°, with overnight lows between 24° and 37°. The average high for December is 40° with an average low of 30°. 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 Walla Walla. See also: January | February | March.
