S
M
T
W
T
F
S
29
52°
34°
30
51°
27°
1
47°
23°
2
37°
21°
3
44°
32°
4
49°
32°
5
43°
31°
6
38°
26°
7
36°
21°
8
34°
21°
9
39°
25°
10
43°
29°
11
44°
27°
12
48°
27°
13
45°
29°
14
41°
24°
15
43°
23°
16
42°
23°
17
38°
19°
18
35°
15°
19
34°
12°
20
32°
10°
21
30°
23°
22
36°
15°
23
37°
19°
24
35°
11°
25
31°
16°
26
31°
24°
27
36°
20°
28
37°
14°
29
33°
16°
30
31°
17°
31
31°
10°
1
32°
5°
2
29°
11°
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 29° to 52°, with overnight lows between 5° and 34°. The average high for December is 38° with an average low of 21°. 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.