S
M
T
W
T
F
S
29
49°
42°
30
55°
42°
1
54°
43°
2
55°
42°
3
56°
41°
4
47°
38°
5
52°
40°
6
52°
40°
7
50°
36°
8
44°
34°
9
42°
30°
10
41°
31°
11
40°
35°
12
41°
33°
13
44°
32°
14
37°
25°
15
40°
28°
16
41°
34°
17
44°
35°
18
41°
37°
19
48°
30°
20
45°
22°
21
39°
22°
22
36°
23°
23
36°
29°
24
37°
29°
25
50°
28°
26
41°
23°
27
39°
21°
28
35°
21°
29
36°
22°
30
39°
35°
31
49°
27°
1
53°
21°
2
39°
18°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Timonium
Timonium's December 2026 forecast shows daily high temperatures ranging from 35° to 56°, with overnight lows between 18° and 43°. The average high for December is 44° with an average low of 31°. 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 Timonium. See also: January | February | March.
