S
M
T
W
T
F
S
30
82°
64°
31
89°
69°
1
91°
73°
2
93°
72°
3
93°
72°
4
94°
71°
5
85°
66°
6
78°
62°
7
81°
57°
8
87°
60°
9
89°
68°
10
81°
65°
11
81°
59°
12
80°
68°
13
87°
59°
14
74°
52°
15
89°
69°
16
87°
70°
17
85°
65°
18
78°
58°
19
85°
66°
20
76°
61°
21
77°
59°
22
76°
59°
23
77°
58°
24
74°
52°
25
73°
51°
26
72°
52°
27
71°
52°
28
74°
48°
29
75°
54°
30
76°
55°
1
74°
54°
2
75°
52°
3
74°
52°
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 71° to 89°, with overnight lows between 48° and 70°. The average high for September is 77° with an average low of 57°. 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.
