S
M
T
W
T
F
S
29
54°
39°
30
55°
40°
1
53°
32°
2
40°
30°
3
43°
32°
4
51°
34°
5
51°
36°
6
41°
28°
7
38°
24°
8
37°
23°
9
37°
26°
10
43°
30°
11
44°
28°
12
48°
30°
13
45°
28°
14
39°
25°
15
41°
26°
16
40°
30°
17
41°
28°
18
39°
22°
19
37°
21°
20
36°
19°
21
34°
20°
22
35°
26°
23
40°
25°
24
37°
26°
25
36°
18°
26
36°
18°
27
35°
19°
28
35°
18°
29
34°
23°
30
34°
20°
31
35°
17°
1
35°
12°
2
33°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Hartford
Hartford's December 2026 forecast shows daily high temperatures ranging from 33° to 55°, with overnight lows between 12° and 40°. The average high for December is 40° with an average low of 25°. 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 Hartford. See also: January | February | March.
