S
M
T
W
T
F
S
29
65°
41°
30
65°
41°
1
64°
40°
2
59°
41°
3
62°
36°
4
55°
34°
5
55°
34°
6
56°
35°
7
57°
37°
8
55°
34°
9
53°
39°
10
54°
34°
11
53°
28°
12
51°
28°
13
52°
29°
14
53°
30°
15
54°
31°
16
52°
30°
17
53°
30°
18
53°
31°
19
54°
32°
20
55°
33°
21
57°
37°
22
57°
40°
23
54°
29°
24
57°
29°
25
51°
30°
26
51°
30°
27
52°
31°
28
54°
32°
29
58°
33°
30
58°
34°
31
60°
35°
1
57°
32°
2
58°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Barstow
Barstow's December 2026 forecast shows daily high temperatures ranging from 51° to 65°, with overnight lows between 28° and 41°. The average high for December is 56° with an average low of 34°. 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 Barstow. See also: January | February | March.
