S
M
T
W
T
F
S
26
78°
62°
27
80°
63°
28
82°
64°
29
77°
63°
30
77°
63°
31
77°
62°
1
78°
64°
2
76°
66°
3
82°
67°
4
81°
66°
5
78°
66°
6
77°
62°
7
76°
60°
8
76°
60°
9
76°
61°
10
75°
58°
11
75°
59°
12
78°
66°
13
82°
67°
14
84°
66°
15
82°
65°
16
79°
66°
17
81°
67°
18
81°
65°
19
76°
62°
20
75°
61°
21
75°
64°
22
74°
61°
23
74°
61°
24
75°
59°
25
77°
64°
26
79°
65°
27
75°
65°
28
78°
55°
29
77°
54°
30
77°
54°
31
80°
56°
1
82°
60°
2
81°
62°
3
82°
58°
4
78°
53°
5
78°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harpers Ferry
Harpers Ferry's August 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 53° and 67°. The average high for August is 78° with an average low of 62°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Harpers Ferry. See also: September | October | November.