S
M
T
W
T
F
S
29
38°
21°
30
27°
18°
1
23°
19°
2
36°
22°
3
37°
21°
4
35°
21°
5
31°
20°
6
28°
16°
7
20°
17°
8
34°
19°
9
35°
20°
10
35°
19°
11
34°
19°
12
34°
18°
13
35°
19°
14
27°
15°
15
29°
16°
16
29°
11°
17
28°
8°
18
22°
-2°
19
21°
-3°
20
14°
13°
21
27°
14°
22
28°
11°
23
26°
9°
24
22°
11°
25
27°
12°
26
26°
12°
27
27°
2°
28
24°
-2°
29
15°
-3°
30
12°
-5°
31
10°
-5°
1
11°
7°
2
13°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Wilton
Wilton's December 2026 forecast shows daily high temperatures ranging from 10° to 38°, with overnight lows between -5° and 22°. The average high for December is 26° with an average low of 12°. 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 Wilton. See also: January | February | March.
