S
M
T
W
T
F
S
26
88°
67°
27
92°
67°
28
84°
65°
29
82°
65°
30
86°
66°
31
91°
64°
1
88°
66°
2
82°
72°
3
91°
70°
4
92°
63°
5
88°
72°
6
95°
72°
7
90°
72°
8
88°
71°
9
93°
73°
10
88°
68°
11
87°
70°
12
87°
73°
13
90°
74°
14
84°
70°
15
90°
66°
16
76°
72°
17
92°
72°
18
83°
61°
19
85°
67°
20
73°
63°
21
80°
64°
22
79°
65°
23
80°
58°
24
79°
58°
25
76°
61°
26
79°
62°
27
77°
61°
28
77°
62°
29
78°
62°
30
79°
62°
31
79°
60°
1
78°
60°
2
77°
58°
3
75°
61°
4
80°
61°
5
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chambersburg
Chambersburg's August 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 58° and 67°. The average high for August is 78° 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 Chambersburg. See also: September | October | November.
