S
M
T
W
T
F
S
29
67°
34°
30
66°
31°
1
55°
28°
2
53°
30°
3
52°
37°
4
55°
43°
5
59°
43°
6
64°
41°
7
61°
42°
8
59°
38°
9
62°
31°
10
54°
28°
11
50°
29°
12
51°
27°
13
54°
26°
14
50°
27°
15
50°
29°
16
49°
31°
17
Hist. Avg.
55°
36°
18
Hist. Avg.
55°
35°
19
Hist. Avg.
55°
35°
20
Hist. Avg.
55°
35°
21
Hist. Avg.
54°
35°
22
Hist. Avg.
54°
35°
23
Hist. Avg.
54°
35°
24
Hist. Avg.
54°
34°
25
Hist. Avg.
54°
34°
26
Hist. Avg.
54°
34°
27
Hist. Avg.
54°
34°
28
Hist. Avg.
53°
34°
29
Hist. Avg.
53°
34°
30
Hist. Avg.
53°
34°
31
Hist. Avg.
53°
34°
1
Hist. Avg.
53°
34°
2
Hist. Avg.
53°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Old Harmony
Old Harmony's December 2026 forecast shows daily high temperatures ranging from 49° to 67°, with overnight lows between 26° and 43°. The average high for December is 56° with an average low of 33°. 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 Old Harmony. See also: January | February | March.