S
M
T
W
T
F
S
30
48°
44°
1
52°
45°
2
59°
41°
3
66°
41°
4
53°
40°
5
48°
40°
6
47°
44°
7
47°
44°
8
48°
43°
9
46°
43°
10
47°
44°
11
49°
43°
12
46°
42°
13
47°
40°
14
45°
40°
15
48°
40°
16
56°
43°
17
68°
49°
18
58°
44°
19
61°
54°
20
62°
56°
21
60°
58°
22
62°
58°
23
61°
56°
24
61°
54°
25
60°
51°
26
58°
52°
27
56°
43°
28
58°
37°
29
58°
37°
30
48°
36°
31
51°
42°
1
55°
48°
2
59°
53°
3
61°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Greenbrae
Greenbrae's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Greenbrae. See also: January | February | March.
