S
M
T
W
T
F
S
29
43°
28°
30
42°
26°
1
35°
25°
2
37°
26°
3
36°
25°
4
34°
25°
5
37°
24°
6
37°
25°
7
36°
24°
8
38°
23°
9
36°
24°
10
34°
23°
11
33°
22°
12
32°
21°
13
30°
20°
14
28°
20°
15
33°
21°
16
33°
21°
17
36°
20°
18
34°
20°
19
34°
19°
20
30°
19°
21
27°
18°
22
31°
19°
23
31°
16°
24
28°
9°
25
20°
9°
26
24°
13°
27
27°
12°
28
28°
14°
29
30°
7°
30
28°
0°
31
23°
0°
1
15°
1°
2
17°
2°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Delavan
Delavan's December 2026 forecast shows daily high temperatures ranging from 15° to 43°, with overnight lows between 0° and 28°. The average high for December is 31° with an average low of 18°. 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 Delavan. See also: January | February | March.
