S
M
T
W
T
F
S
29
65°
41°
30
65°
40°
1
64°
42°
2
63°
45°
3
62°
45°
4
57°
44°
5
57°
42°
6
58°
40°
7
56°
42°
8
57°
42°
9
58°
43°
10
57°
39°
11
54°
40°
12
57°
42°
13
59°
45°
14
59°
38°
15
57°
37°
16
57°
38°
17
56°
37°
18
52°
36°
19
52°
34°
20
51°
33°
21
51°
33°
22
52°
34°
23
52°
32°
24
51°
32°
25
52°
33°
26
51°
32°
27
50°
31°
28
52°
35°
29
54°
36°
30
54°
37°
31
58°
36°
1
54°
33°
2
53°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lathrop
Lathrop's December 2026 forecast shows daily high temperatures ranging from 50° to 65°, with overnight lows between 31° and 45°. The average high for December is 56° with an average low of 38°. 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 Lathrop. See also: January | February | March.