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