S
M
T
W
T
F
S
29
43°
28°
30
43°
25°
1
36°
25°
2
35°
26°
3
36°
24°
4
34°
24°
5
36°
23°
6
37°
24°
7
36°
23°
8
38°
23°
9
37°
22°
10
34°
23°
11
34°
22°
12
32°
21°
13
30°
17°
14
25°
18°
15
31°
20°
16
31°
20°
17
35°
21°
18
35°
20°
19
32°
19°
20
30°
17°
21
25°
17°
22
29°
19°
23
32°
16°
24
30°
10°
25
20°
8°
26
24°
12°
27
26°
10°
28
27°
12°
29
29°
9°
30
28°
0°
31
24°
0°
1
16°
1°
2
17°
3°
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 16° to 43°, with overnight lows between 0° and 28°. The average high for December is 31° with an average low of 17°. 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.
