S
M
T
W
T
F
S
29
57°
41°
30
57°
37°
1
58°
41°
2
61°
44°
3
57°
43°
4
57°
42°
5
61°
40°
6
61°
39°
7
60°
42°
8
61°
43°
9
61°
41°
10
60°
41°
11
60°
43°
12
59°
42°
13
60°
43°
14
60°
41°
15
60°
38°
16
59°
39°
17
58°
38°
18
61°
38°
19
62°
41°
20
61°
40°
21
59°
38°
22
61°
42°
23
60°
37°
24
61°
44°
25
60°
42°
26
61°
34°
27
55°
38°
28
53°
42°
29
54°
40°
30
60°
42°
31
61°
43°
1
63°
39°
2
59°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Atherton
Atherton's December 2026 forecast shows daily high temperatures ranging from 53° to 63°, with overnight lows between 34° and 44°. The average high for December is 59° with an average low of 40°. 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 Atherton. See also: January | February | March.
