S
M
T
W
T
F
S
29
64°
46°
30
68°
45°
1
67°
46°
2
68°
44°
3
64°
42°
4
55°
39°
5
61°
43°
6
65°
43°
7
63°
41°
8
56°
41°
9
54°
40°
10
54°
37°
11
56°
33°
12
52°
34°
13
53°
34°
14
55°
29°
15
51°
38°
16
56°
40°
17
65°
39°
18
64°
40°
19
62°
34°
20
62°
25°
21
58°
26°
22
49°
29°
23
52°
37°
24
64°
28°
25
65°
26°
26
50°
29°
27
51°
29°
28
50°
31°
29
51°
38°
30
56°
38°
31
65°
26°
1
65°
24°
2
51°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Delco
Delco's December 2026 forecast shows daily high temperatures ranging from 49° to 68°, with overnight lows between 21° and 46°. The average high for December is 58° with an average low of 35°. 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 Delco. See also: January | February | March.
