S
M
T
W
T
F
S
29
56°
37°
30
56°
38°
1
55°
44°
2
57°
41°
3
58°
44°
4
60°
38°
5
58°
36°
6
54°
40°
7
58°
41°
8
61°
40°
9
61°
40°
10
60°
41°
11
60°
42°
12
61°
42°
13
61°
41°
14
60°
41°
15
60°
40°
16
59°
42°
17
60°
41°
18
60°
39°
19
59°
42°
20
59°
37°
21
52°
33°
22
51°
35°
23
49°
38°
24
51°
35°
25
50°
34°
26
49°
33°
27
50°
31°
28
50°
33°
29
51°
35°
30
51°
42°
31
53°
36°
1
55°
38°
2
53°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Modesto
Modesto's December 2026 forecast shows daily high temperatures ranging from 49° to 61°, with overnight lows between 31° and 44°. The average high for December is 56° with an average low of 39°. 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 Modesto. See also: January | February | March.
