S
M
T
W
T
F
S
29
39°
26°
30
38°
23°
1
38°
25°
2
33°
25°
3
35°
23°
4
33°
26°
5
33°
22°
6
35°
20°
7
31°
21°
8
32°
22°
9
31°
17°
10
34°
24°
11
39°
25°
12
35°
27°
13
38°
26°
14
39°
28°
15
Hist. Avg.
33°
21°
16
Hist. Avg.
33°
20°
17
Hist. Avg.
33°
20°
18
Hist. Avg.
33°
20°
19
Hist. Avg.
33°
20°
20
Hist. Avg.
32°
19°
21
Hist. Avg.
32°
19°
22
Hist. Avg.
32°
19°
23
Hist. Avg.
32°
19°
24
Hist. Avg.
32°
19°
25
Hist. Avg.
31°
18°
26
Hist. Avg.
31°
18°
27
Hist. Avg.
31°
18°
28
Hist. Avg.
31°
18°
29
Hist. Avg.
31°
17°
30
Hist. Avg.
31°
17°
31
Hist. Avg.
30°
17°
1
Hist. Avg.
30°
17°
2
Hist. Avg.
30°
17°
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 31° to 39°, with overnight lows between 17° and 28°. The average high for December is 35° with an average low of 24°. 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.
