S
M
T
W
T
F
S
30
84°
63°
31
84°
63°
1
85°
60°
2
78°
55°
3
77°
55°
4
77°
56°
5
78°
54°
6
81°
59°
7
84°
61°
8
84°
61°
9
83°
60°
10
84°
61°
11
84°
60°
12
85°
61°
13
84°
62°
14
84°
55°
15
76°
52°
16
73°
50°
17
74°
51°
18
73°
49°
19
72°
48°
20
72°
48°
21
78°
49°
22
79°
53°
23
80°
47°
24
80°
46°
25
71°
46°
26
73°
48°
27
74°
54°
28
77°
53°
29
76°
44°
30
69°
43°
1
69°
51°
2
70°
50°
3
74°
48°
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 69° to 85°, with overnight lows between 43° and 63°. The average high for September is 78° with an average low of 54°. 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.
