S
M
T
W
T
F
S
29
44°
26°
30
43°
27°
1
43°
30°
2
42°
31°
3
51°
23°
4
52°
20°
5
37°
26°
6
39°
25°
7
44°
28°
8
49°
30°
9
37°
21°
10
47°
36°
11
50°
35°
12
Hist. Avg.
40°
24°
13
Hist. Avg.
40°
24°
14
Hist. Avg.
40°
24°
15
Hist. Avg.
39°
23°
16
Hist. Avg.
39°
23°
17
Hist. Avg.
39°
23°
18
Hist. Avg.
38°
22°
19
Hist. Avg.
38°
22°
20
Hist. Avg.
38°
22°
21
Hist. Avg.
38°
22°
22
Hist. Avg.
38°
22°
23
Hist. Avg.
37°
21°
24
Hist. Avg.
37°
21°
25
Hist. Avg.
37°
21°
26
Hist. Avg.
37°
21°
27
Hist. Avg.
37°
21°
28
Hist. Avg.
37°
20°
29
Hist. Avg.
36°
20°
30
Hist. Avg.
36°
20°
31
Hist. Avg.
36°
20°
1
Hist. Avg.
36°
20°
2
Hist. Avg.
36°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Delaware
Delaware's December 2026 forecast shows daily high temperatures ranging from 37° to 52°, with overnight lows between 20° and 36°. The average high for December is 44° 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 Delaware. See also: January | February | March.
