S
M
T
W
T
F
S
29
46°
24°
30
47°
27°
1
45°
28°
2
42°
26°
3
50°
19°
4
49°
18°
5
33°
26°
6
41°
28°
7
47°
29°
8
50°
30°
9
34°
18°
10
49°
34°
11
50°
30°
12
Hist. Avg.
39°
21°
13
Hist. Avg.
39°
21°
14
Hist. Avg.
38°
21°
15
Hist. Avg.
38°
20°
16
Hist. Avg.
38°
20°
17
Hist. Avg.
37°
20°
18
Hist. Avg.
37°
20°
19
Hist. Avg.
37°
20°
20
Hist. Avg.
37°
19°
21
Hist. Avg.
36°
19°
22
Hist. Avg.
36°
19°
23
Hist. Avg.
36°
19°
24
Hist. Avg.
36°
18°
25
Hist. Avg.
36°
18°
26
Hist. Avg.
35°
18°
27
Hist. Avg.
35°
18°
28
Hist. Avg.
35°
18°
29
Hist. Avg.
35°
18°
30
Hist. Avg.
35°
18°
31
Hist. Avg.
35°
17°
1
Hist. Avg.
35°
17°
2
Hist. Avg.
35°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Greencastle
Greencastle's December 2026 forecast shows daily high temperatures ranging from 33° to 50°, with overnight lows between 18° and 34°. The average high for December is 45° 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 Greencastle. See also: January | February | March.
