S
M
T
W
T
F
S
30
66°
36°
1
50°
43°
2
46°
41°
3
50°
34°
4
52°
32°
5
46°
39°
6
43°
37°
7
43°
36°
8
43°
36°
9
37°
30°
10
55°
28°
11
50°
32°
12
54°
32°
13
64°
32°
14
57°
27°
15
36°
19°
16
54°
21°
17
63°
30°
18
63°
41°
19
64°
37°
20
55°
32°
21
64°
32°
22
55°
34°
23
63°
32°
24
73°
45°
25
75°
43°
26
59°
46°
27
73°
45°
28
55°
41°
29
68°
39°
30
45°
28°
31
50°
25°
1
59°
34°
2
63°
36°
3
54°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Gresham
Gresham's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Gresham. See also: January | February | March.