S
M
T
W
T
F
S
29
45°
25°
30
39°
21°
1
38°
22°
2
37°
29°
3
40°
31°
4
50°
28°
5
47°
27°
6
41°
25°
7
42°
26°
8
42°
26°
9
45°
24°
10
44°
28°
11
44°
29°
12
Hist. Avg.
40°
25°
13
Hist. Avg.
40°
24°
14
Hist. Avg.
40°
24°
15
Hist. Avg.
39°
24°
16
Hist. Avg.
39°
23°
17
Hist. Avg.
39°
23°
18
Hist. Avg.
38°
23°
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.
36°
21°
27
Hist. Avg.
36°
20°
28
Hist. Avg.
36°
20°
29
Hist. Avg.
36°
20°
30
Hist. Avg.
36°
20°
31
Hist. Avg.
36°
19°
1
Hist. Avg.
35°
19°
2
Hist. Avg.
35°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Derry
Derry's December 2026 forecast shows daily high temperatures ranging from 37° to 50°, with overnight lows between 21° and 31°. The average high for December is 43° with an average low of 26°. 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.
