S
M
T
W
T
F
S
29
40°
27°
30
40°
26°
1
41°
29°
2
40°
35°
3
52°
28°
4
54°
23°
5
37°
29°
6
37°
29°
7
42°
30°
8
49°
31°
9
37°
23°
10
46°
38°
11
50°
39°
12
Hist. Avg.
42°
29°
13
Hist. Avg.
42°
28°
14
Hist. Avg.
41°
28°
15
Hist. Avg.
41°
28°
16
Hist. Avg.
41°
28°
17
Hist. Avg.
40°
27°
18
Hist. Avg.
40°
27°
19
Hist. Avg.
40°
27°
20
Hist. Avg.
40°
27°
21
Hist. Avg.
40°
26°
22
Hist. Avg.
39°
26°
23
Hist. Avg.
39°
26°
24
Hist. Avg.
39°
26°
25
Hist. Avg.
39°
26°
26
Hist. Avg.
39°
25°
27
Hist. Avg.
38°
25°
28
Hist. Avg.
38°
25°
29
Hist. Avg.
38°
25°
30
Hist. Avg.
38°
24°
31
Hist. Avg.
38°
24°
1
Hist. Avg.
38°
24°
2
Hist. Avg.
38°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Mount Oliver
Mount Oliver's December 2026 forecast shows daily high temperatures ranging from 37° to 54°, with overnight lows between 23° and 39°. The average high for December is 43° with an average low of 30°. 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 Mount Oliver. See also: January | February | March.
