S
M
T
W
T
F
S
29
48°
35°
30
51°
37°
1
53°
36°
2
51°
37°
3
53°
35°
4
50°
34°
5
51°
33°
6
48°
35°
7
51°
33°
8
44°
31°
9
41°
31°
10
42°
28°
11
40°
32°
12
41°
29°
13
42°
27°
14
42°
21°
15
38°
22°
16
36°
24°
17
38°
23°
18
37°
29°
19
45°
28°
20
46°
24°
21
40°
22°
22
37°
22°
23
36°
20°
24
37°
25°
25
39°
20°
26
45°
15°
27
36°
15°
28
30°
16°
29
34°
15°
30
33°
20°
31
35°
26°
1
47°
20°
2
44°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Harmony
Harmony's December 2026 forecast shows daily high temperatures ranging from 30° to 53°, with overnight lows between 15° and 37°. The average high for December is 42° with an average low of 26°. 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 Harmony. See also: January | February | March.
