S
M
T
W
T
F
S
29
61°
37°
30
60°
38°
1
60°
43°
2
64°
41°
3
63°
44°
4
66°
40°
5
64°
36°
6
59°
39°
7
62°
40°
8
66°
40°
9
65°
41°
10
65°
41°
11
64°
40°
12
65°
41°
13
65°
41°
14
64°
40°
15
64°
40°
16
63°
41°
17
64°
40°
18
64°
39°
19
63°
42°
20
64°
37°
21
57°
33°
22
56°
35°
23
54°
38°
24
56°
36°
25
54°
34°
26
53°
33°
27
55°
31°
28
55°
34°
29
56°
36°
30
56°
41°
31
59°
36°
1
60°
37°
2
59°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Gustine
Gustine's December 2026 forecast shows daily high temperatures ranging from 53° to 66°, with overnight lows between 31° and 44°. The average high for December is 61° 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 Gustine. See also: January | February | March.
