S
M
T
W
T
F
S
29
33°
24°
30
34°
26°
1
34°
30°
2
37°
30°
3
39°
29°
4
42°
31°
5
38°
30°
6
42°
31°
7
40°
30°
8
38°
29°
9
38°
28°
10
34°
27°
11
41°
24°
12
36°
23°
13
34°
13°
14
33°
12°
15
28°
15°
16
31°
18°
17
28°
24°
18
34°
25°
19
34°
19°
20
35°
24°
21
33°
24°
22
34°
25°
23
37°
24°
24
39°
18°
25
37°
14°
26
30°
15°
27
27°
20°
28
31°
22°
29
37°
21°
30
36°
24°
31
39°
25°
1
39°
18°
2
40°
11°
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 27° to 42°, with overnight lows between 11° and 31°. The average high for December is 35° with an average low of 23°. 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.
