S
M
T
W
T
F
S
29
49°
38°
30
60°
38°
1
56°
40°
2
58°
37°
3
51°
34°
4
53°
30°
5
57°
36°
6
57°
35°
7
45°
31°
8
44°
27°
9
44°
25°
10
45°
23°
11
42°
22°
12
42°
23°
13
44°
22°
14
43°
22°
15
44°
27°
16
44°
31°
17
45°
34°
18
50°
31°
19
52°
22°
20
47°
20°
21
43°
19°
22
40°
21°
23
43°
26°
24
42°
21°
25
42°
20°
26
40°
19°
27
40°
20°
28
41°
19°
29
41°
23°
30
43°
27°
31
49°
22°
1
50°
18°
2
40°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Greeneville
Greeneville's December 2026 forecast shows daily high temperatures ranging from 40° to 60°, with overnight lows between 15° and 40°. The average high for December is 46° 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 Greeneville. See also: January | February | March.
