S
M
T
W
T
F
S
29
48°
40°
30
52°
40°
1
53°
41°
2
52°
39°
3
54°
36°
4
46°
32°
5
51°
37°
6
52°
37°
7
46°
33°
8
41°
31°
9
40°
28°
10
39°
27°
11
38°
33°
12
39°
33°
13
41°
32°
14
35°
23°
15
38°
26°
16
38°
30°
17
39°
32°
18
37°
33°
19
44°
28°
20
41°
21°
21
37°
21°
22
34°
23°
23
33°
27°
24
34°
25°
25
41°
27°
26
37°
21°
27
36°
17°
28
33°
16°
29
32°
14°
30
34°
30°
31
43°
25°
1
48°
20°
2
35°
18°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Greencastle
Greencastle's December 2026 forecast shows daily high temperatures ranging from 32° to 54°, with overnight lows between 14° and 41°. The average high for December is 41° with an average low of 28°. 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 Greencastle. See also: January | February | March.
