S
M
T
W
T
F
S
30
78°
59°
31
87°
50°
1
77°
51°
2
85°
61°
3
91°
65°
4
89°
56°
5
95°
69°
6
88°
66°
7
82°
67°
8
83°
56°
9
78°
55°
10
89°
48°
11
80°
53°
12
65°
47°
13
73°
47°
14
74°
52°
15
71°
50°
16
68°
48°
17
73°
46°
18
65°
59°
19
63°
59°
20
62°
55°
21
63°
49°
22
63°
47°
23
65°
57°
24
75°
53°
25
65°
57°
26
72°
56°
27
70°
59°
28
69°
54°
29
65°
51°
30
72°
48°
1
66°
48°
2
65°
47°
3
61°
42°
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 61° to 72°, with overnight lows between 42° and 59°. The average high for September is 67° 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.
