S
M
T
W
T
F
S
26
87°
68°
27
87°
67°
28
86°
68°
29
87°
68°
30
88°
69°
31
88°
68°
1
85°
67°
2
81°
66°
3
80°
64°
4
79°
67°
5
79°
65°
6
80°
62°
7
80°
63°
8
82°
65°
9
84°
67°
10
85°
67°
11
86°
66°
12
84°
67°
13
85°
66°
14
86°
65°
15
84°
67°
16
80°
67°
17
82°
66°
18
86°
67°
19
85°
66°
20
81°
60°
21
82°
58°
22
79°
58°
23
79°
60°
24
80°
60°
25
80°
59°
26
79°
63°
27
80°
60°
28
80°
59°
29
79°
59°
30
78°
57°
31
76°
56°
1
76°
57°
2
77°
59°
3
76°
63°
4
77°
57°
5
78°
57°
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 76° to 88°, with overnight lows between 56° and 69°. The average high for August is 82° with an average low of 63°. 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.
