S
M
T
W
T
F
S
29
40°
23°
30
39°
28°
1
40°
30°
2
40°
29°
3
39°
30°
4
40°
28°
5
40°
27°
6
41°
24°
7
37°
21°
8
35°
24°
9
36°
28°
10
40°
29°
11
47°
24°
12
34°
19°
13
45°
33°
14
43°
26°
15
38°
25°
16
Hist. Avg.
37°
22°
17
Hist. Avg.
36°
21°
18
Hist. Avg.
36°
21°
19
Hist. Avg.
36°
21°
20
Hist. Avg.
36°
21°
21
Hist. Avg.
35°
21°
22
Hist. Avg.
35°
20°
23
Hist. Avg.
35°
20°
24
Hist. Avg.
35°
20°
25
Hist. Avg.
34°
20°
26
Hist. Avg.
34°
20°
27
Hist. Avg.
34°
19°
28
Hist. Avg.
34°
19°
29
Hist. Avg.
34°
19°
30
Hist. Avg.
34°
19°
31
Hist. Avg.
33°
19°
1
Hist. Avg.
35°
19°
2
Hist. Avg.
34°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Gettysburg
Gettysburg's December 2026 forecast shows daily high temperatures ranging from 34° to 47°, with overnight lows between 19° and 33°. The average high for December is 40° 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 Gettysburg. See also: January | February | March.
