S
M
T
W
T
F
S
26
90°
67°
27
89°
67°
28
91°
71°
29
90°
72°
30
92°
72°
31
91°
71°
1
88°
71°
2
87°
70°
3
90°
72°
4
87°
71°
5
89°
71°
6
87°
70°
7
87°
70°
8
88°
69°
9
90°
71°
10
87°
71°
11
87°
70°
12
88°
69°
13
86°
68°
14
86°
68°
15
88°
70°
16
91°
71°
17
90°
71°
18
88°
70°
19
87°
70°
20
87°
66°
21
90°
64°
22
86°
63°
23
86°
64°
24
85°
65°
25
86°
67°
26
87°
68°
27
87°
66°
28
90°
68°
29
90°
68°
30
85°
67°
31
86°
67°
1
84°
64°
2
85°
65°
3
89°
65°
4
89°
67°
5
88°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harrisburg
Harrisburg's August 2026 forecast shows daily high temperatures ranging from 84° to 92°, with overnight lows between 63° and 72°. The average high for August is 88° with an average low of 68°. 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 Harrisburg. See also: September | October | November.
