S
M
T
W
T
F
S
29
66°
36°
30
67°
32°
1
57°
26°
2
56°
27°
3
59°
34°
4
68°
33°
5
58°
29°
6
56°
28°
7
55°
24°
8
53°
23°
9
54°
24°
10
55°
28°
11
56°
27°
12
61°
32°
13
58°
31°
14
60°
26°
15
57°
29°
16
57°
26°
17
58°
24°
18
55°
23°
19
56°
24°
20
55°
24°
21
57°
29°
22
56°
23°
23
54°
24°
24
57°
24°
25
56°
25°
26
55°
26°
27
60°
30°
28
61°
24°
29
56°
25°
30
55°
22°
31
59°
23°
1
54°
25°
2
58°
32°
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 53° to 68°, with overnight lows between 22° and 36°. The average high for December is 58° with an average low of 27°. 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.
