S
M
T
W
T
F
S
30
82°
60°
31
82°
68°
1
93°
69°
2
92°
74°
3
95°
73°
4
88°
64°
5
81°
60°
6
81°
56°
7
81°
60°
8
84°
61°
9
83°
60°
10
83°
60°
11
84°
54°
12
76°
54°
13
76°
55°
14
80°
59°
15
77°
59°
16
74°
58°
17
75°
52°
18
72°
49°
19
71°
50°
20
73°
54°
21
77°
57°
22
79°
57°
23
80°
58°
24
80°
56°
25
78°
53°
26
76°
55°
27
77°
56°
28
77°
55°
29
78°
54°
30
72°
49°
1
69°
47°
2
71°
52°
3
75°
53°
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 69° to 95°, with overnight lows between 47° and 74°. The average high for September is 79° 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.
