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