S
M
T
W
T
F
S
30
31°
22°
1
40°
18°
2
53°
22°
3
40°
31°
4
41°
21°
5
51°
16°
6
63°
27°
7
51°
22°
8
61°
19°
9
70°
30°
10
52°
31°
11
82°
32°
12
51°
28°
13
46°
19°
14
41°
19°
15
70°
20°
16
71°
24°
17
71°
27°
18
53°
24°
19
66°
20°
20
58°
26°
21
55°
23°
22
80°
28°
23
72°
34°
24
77°
37°
25
83°
34°
26
72°
38°
27
77°
36°
28
51°
16°
29
45°
12°
30
60°
16°
31
67°
20°
1
64°
28°
2
63°
28°
3
65°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Johnson City
Johnson City's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Johnson City. See also: January | February | March.
