S
M
T
W
T
F
S
29
46°
32°
30
45°
31°
1
46°
39°
2
49°
40°
3
50°
40°
4
50°
37°
5
52°
31°
6
51°
31°
7
49°
32°
8
48°
36°
9
52°
34°
10
48°
31°
11
49°
31°
12
48°
32°
13
50°
38°
14
45°
37°
15
52°
36°
16
48°
37°
17
47°
34°
18
48°
38°
19
51°
37°
20
49°
38°
21
46°
39°
22
51°
36°
23
50°
37°
24
48°
34°
25
50°
28°
26
48°
29°
27
42°
30°
28
41°
32°
29
44°
30°
30
43°
40°
31
50°
39°
1
52°
34°
2
51°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Tualatin
Tualatin's December 2026 forecast shows daily high temperatures ranging from 41° to 52°, with overnight lows between 28° and 40°. The average high for December is 48° with an average low of 35°. 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 Tualatin. See also: January | February | March.
