S
M
T
W
T
F
S
30
78°
61°
31
84°
60°
1
79°
58°
2
75°
56°
3
82°
60°
4
85°
61°
5
84°
61°
6
84°
60°
7
83°
60°
8
84°
59°
9
83°
59°
10
83°
58°
11
78°
48°
12
81°
54°
13
80°
55°
14
82°
53°
15
79°
47°
16
68°
49°
17
68°
46°
18
73°
44°
19
69°
52°
20
68°
53°
21
78°
54°
22
79°
54°
23
79°
53°
24
78°
52°
25
77°
47°
26
76°
38°
27
65°
41°
28
63°
47°
29
73°
52°
30
73°
34°
1
75°
33°
2
61°
33°
3
56°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gettysburg
Gettysburg's September 2026 forecast shows daily high temperatures ranging from 56° to 85°, with overnight lows between 33° and 61°. The average high for September is 76° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Gettysburg. See also: October | November | December.
