S
M
T
W
T
F
S
29
45°
33°
30
48°
35°
1
49°
34°
2
47°
35°
3
49°
33°
4
48°
32°
5
47°
31°
6
45°
32°
7
48°
31°
8
42°
30°
9
39°
30°
10
39°
29°
11
38°
29°
12
39°
28°
13
40°
24°
14
40°
17°
15
35°
18°
16
31°
21°
17
33°
19°
18
32°
26°
19
39°
25°
20
43°
23°
21
37°
18°
22
34°
20°
23
33°
14°
24
34°
22°
25
35°
18°
26
40°
13°
27
32°
14°
28
28°
14°
29
32°
13°
30
30°
17°
31
31°
24°
1
43°
20°
2
42°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Derry
Derry's December 2026 forecast shows daily high temperatures ranging from 28° to 49°, with overnight lows between 13° and 35°. The average high for December is 39° 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 Derry. See also: January | February | March.
