S
M
T
W
T
F
S
29
42°
35°
30
41°
37°
1
40°
37°
2
41°
36°
3
44°
37°
4
44°
35°
5
43°
37°
6
46°
34°
7
43°
35°
8
44°
36°
9
45°
33°
10
41°
36°
11
38°
29°
12
37°
31°
13
42°
35°
14
41°
34°
15
43°
35°
16
46°
33°
17
46°
29°
18
44°
27°
19
38°
26°
20
37°
27°
21
36°
26°
22
38°
23°
23
35°
25°
24
33°
33°
25
39°
33°
26
40°
32°
27
40°
27°
28
39°
27°
29
38°
24°
30
37°
25°
31
35°
25°
1
36°
22°
2
34°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in The Dalles
The Dalles's December 2026 forecast shows daily high temperatures ranging from 33° to 46°, with overnight lows between 22° and 37°. The average high for December is 40° with an average low of 31°. 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 The Dalles. See also: January | February | March.
