S
M
T
W
T
F
S
29
43°
23°
30
41°
22°
1
42°
22°
2
41°
23°
3
42°
26°
4
45°
30°
5
46°
32°
6
41°
34°
7
42°
31°
8
40°
31°
9
40°
27°
10
41°
27°
11
53°
35°
12
53°
31°
13
57°
26°
14
56°
23°
15
39°
22°
16
41°
20°
17
40°
25°
18
43°
33°
19
48°
34°
20
52°
35°
21
52°
32°
22
51°
32°
23
51°
34°
24
53°
32°
25
55°
26°
26
55°
21°
27
40°
22°
28
42°
27°
29
46°
31°
30
50°
33°
31
51°
36°
1
52°
34°
2
53°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Harrisonburg
Harrisonburg's December 2026 forecast shows daily high temperatures ranging from 39° to 57°, with overnight lows between 20° and 36°. The average high for December is 47° with an average low of 29°. 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 Harrisonburg. See also: January | February | March.
