S
M
T
W
T
F
S
29
60°
46°
30
60°
47°
1
64°
39°
2
60°
42°
3
57°
47°
4
57°
48°
5
61°
47°
6
63°
48°
7
62°
46°
8
61°
45°
9
58°
44°
10
60°
40°
11
59°
38°
12
58°
46°
13
56°
46°
14
57°
46°
15
Hist. Avg.
58°
41°
16
Hist. Avg.
58°
41°
17
Hist. Avg.
58°
41°
18
Hist. Avg.
58°
41°
19
Hist. Avg.
58°
41°
20
Hist. Avg.
58°
41°
21
Hist. Avg.
58°
41°
22
Hist. Avg.
58°
41°
23
Hist. Avg.
58°
41°
24
Hist. Avg.
58°
41°
25
Hist. Avg.
58°
41°
26
Hist. Avg.
58°
41°
27
Hist. Avg.
58°
41°
28
Hist. Avg.
58°
41°
29
Hist. Avg.
58°
41°
30
Hist. Avg.
58°
41°
31
Hist. Avg.
58°
41°
1
Hist. Avg.
58°
41°
2
Hist. Avg.
58°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Walnut Creek
Walnut Creek's December 2026 forecast shows daily high temperatures ranging from 56° to 64°, with overnight lows between 38° and 48°. The average high for December is 60° with an average low of 45°. 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 Walnut Creek. See also: January | February | March.
