S
M
T
W
T
F
S
29
57°
37°
30
58°
40°
1
63°
44°
2
60°
44°
3
57°
43°
4
58°
38°
5
58°
37°
6
59°
40°
7
59°
41°
8
60°
41°
9
60°
39°
10
61°
41°
11
61°
41°
12
60°
40°
13
60°
40°
14
61°
42°
15
58°
39°
16
59°
43°
17
Hist. Avg.
57°
37°
18
Hist. Avg.
57°
37°
19
Hist. Avg.
57°
37°
20
Hist. Avg.
57°
37°
21
Hist. Avg.
57°
37°
22
Hist. Avg.
57°
37°
23
Hist. Avg.
57°
37°
24
Hist. Avg.
57°
37°
25
Hist. Avg.
57°
37°
26
Hist. Avg.
57°
37°
27
Hist. Avg.
57°
37°
28
Hist. Avg.
57°
37°
29
Hist. Avg.
57°
37°
30
Hist. Avg.
57°
37°
31
Hist. Avg.
57°
37°
1
Hist. Avg.
57°
37°
2
Hist. Avg.
57°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Pleasanton
Pleasanton's December 2026 forecast shows daily high temperatures ranging from 57° to 63°, with overnight lows between 37° and 44°. The average high for December is 59° with an average low of 41°. 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 Pleasanton. See also: January | February | March.
