S
M
T
W
T
F
S
29
65°
51°
30
67°
51°
1
75°
49°
2
74°
40°
3
73°
38°
4
63°
39°
5
64°
46°
6
65°
51°
7
70°
50°
8
72°
44°
9
61°
41°
10
73°
50°
11
75°
43°
12
Hist. Avg.
65°
42°
13
Hist. Avg.
65°
42°
14
Hist. Avg.
64°
42°
15
Hist. Avg.
64°
41°
16
Hist. Avg.
64°
41°
17
Hist. Avg.
64°
41°
18
Hist. Avg.
64°
41°
19
Hist. Avg.
64°
41°
20
Hist. Avg.
64°
41°
21
Hist. Avg.
63°
40°
22
Hist. Avg.
63°
40°
23
Hist. Avg.
63°
40°
24
Hist. Avg.
63°
40°
25
Hist. Avg.
63°
40°
26
Hist. Avg.
63°
40°
27
Hist. Avg.
63°
40°
28
Hist. Avg.
63°
40°
29
Hist. Avg.
63°
40°
30
Hist. Avg.
63°
40°
31
Hist. Avg.
63°
40°
1
Hist. Avg.
63°
39°
2
Hist. Avg.
63°
39°
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 61° to 75°, with overnight lows between 38° and 51°. The average high for December is 69° with an average low of 46°. 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.
