S
M
T
W
T
F
S
30
86°
61°
31
83°
69°
1
94°
71°
2
89°
71°
3
91°
70°
4
91°
68°
5
80°
64°
6
81°
59°
7
80°
56°
8
85°
55°
9
90°
60°
10
86°
71°
11
80°
64°
12
78°
64°
13
87°
69°
14
77°
54°
15
77°
47°
16
88°
55°
17
85°
65°
18
83°
60°
19
74°
65°
20
81°
63°
21
70°
60°
22
66°
53°
23
61°
53°
24
69°
51°
25
66°
49°
26
69°
48°
27
71°
48°
28
71°
47°
29
72°
50°
30
76°
50°
1
75°
48°
2
74°
54°
3
68°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harpers Ferry
Harpers Ferry's September 2026 forecast shows daily high temperatures ranging from 61° to 83°, with overnight lows between 47° and 65°. The average high for September is 72° with an average low of 53°. 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 Harpers Ferry. See also: October | November | December.
