S
M
T
W
T
F
S
29
44°
34°
30
46°
36°
1
49°
35°
2
47°
35°
3
49°
33°
4
43°
29°
5
47°
29°
6
47°
33°
7
46°
31°
8
38°
26°
9
37°
24°
10
35°
23°
11
33°
30°
12
36°
28°
13
37°
27°
14
33°
21°
15
36°
22°
16
36°
26°
17
37°
27°
18
35°
28°
19
42°
26°
20
39°
16°
21
34°
18°
22
31°
19°
23
29°
22°
24
33°
22°
25
38°
21°
26
37°
16°
27
31°
12°
28
28°
12°
29
29°
9°
30
30°
25°
31
37°
23°
1
44°
17°
2
35°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Harleigh
Harleigh's December 2026 forecast shows daily high temperatures ranging from 28° to 49°, with overnight lows between 9° and 36°. The average high for December is 38° with an average low of 24°. 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 Harleigh. See also: January | February | March.