S
M
T
W
T
F
S
26
81°
62°
27
81°
61°
28
80°
63°
29
82°
59°
30
78°
64°
31
85°
65°
1
85°
62°
2
78°
59°
3
78°
60°
4
81°
63°
5
78°
64°
6
79°
64°
7
78°
63°
8
78°
62°
9
79°
60°
10
79°
63°
11
82°
62°
12
78°
58°
13
79°
62°
14
83°
64°
15
82°
63°
16
79°
59°
17
78°
58°
18
82°
63°
19
77°
64°
20
79°
63°
21
76°
62°
22
74°
61°
23
74°
60°
24
75°
62°
25
75°
63°
26
77°
62°
27
78°
63°
28
80°
59°
29
83°
59°
30
82°
58°
31
81°
60°
1
82°
60°
2
81°
59°
3
81°
60°
4
80°
59°
5
80°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Martinsburg
Martinsburg's August 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 58° and 65°. The average high for August is 79° with an average low of 61°. 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 Martinsburg. See also: September | October | November.