S
M
T
W
T
F
S
29
64°
35°
30
56°
35°
1
56°
33°
2
57°
35°
3
59°
33°
4
58°
37°
5
55°
37°
6
58°
36°
7
59°
42°
8
60°
41°
9
58°
44°
10
58°
45°
11
61°
45°
12
61°
41°
13
60°
40°
14
59°
42°
15
60°
43°
16
62°
43°
17
60°
38°
18
56°
40°
19
52°
42°
20
52°
42°
21
59°
40°
22
59°
42°
23
54°
44°
24
57°
42°
25
59°
41°
26
55°
43°
27
56°
38°
28
55°
37°
29
52°
34°
30
52°
42°
31
52°
36°
1
48°
38°
2
Hist. Avg.
56°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Manteca
Manteca's December 2026 forecast shows daily high temperatures ranging from 48° to 64°, with overnight lows between 33° and 45°. The average high for December is 57° with an average low of 40°. 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 Manteca. See also: January | February | March.
