S
M
T
W
T
F
S
29
71°
50°
30
76°
42°
1
73°
41°
2
59°
42°
3
60°
49°
4
64°
53°
5
68°
55°
6
73°
55°
7
73°
42°
8
72°
42°
9
63°
44°
10
65°
48°
11
66°
44°
12
64°
50°
13
65°
48°
14
70°
44°
15
68°
42°
16
61°
43°
17
60°
43°
18
60°
41°
19
59°
45°
20
61°
51°
21
68°
49°
22
71°
44°
23
69°
50°
24
66°
46°
25
65°
40°
26
61°
41°
27
58°
47°
28
61°
49°
29
66°
37°
30
65°
35°
31
58°
37°
1
54°
44°
2
57°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Darien
Darien's December 2026 forecast shows daily high temperatures ranging from 54° to 76°, with overnight lows between 35° and 55°. The average high for December is 65° with an average low of 45°. 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 Darien. See also: January | February | March.
