S
M
T
W
T
F
S
26
90°
67°
27
92°
72°
28
92°
72°
29
91°
70°
30
91°
71°
31
92°
72°
1
92°
72°
2
89°
71°
3
88°
72°
4
92°
72°
5
92°
71°
6
91°
71°
7
92°
72°
8
92°
71°
9
93°
72°
10
91°
72°
11
90°
70°
12
87°
71°
13
88°
70°
14
89°
71°
15
84°
68°
16
83°
68°
17
84°
69°
18
85°
70°
19
86°
70°
20
86°
69°
21
87°
70°
22
86°
69°
23
87°
70°
24
90°
68°
25
90°
69°
26
88°
68°
27
89°
67°
28
90°
67°
29
89°
68°
30
90°
68°
31
90°
67°
1
85°
67°
2
84°
66°
3
84°
67°
4
85°
67°
5
84°
66°
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 83° to 93°, with overnight lows between 66° and 72°. The average high for August is 89° with an average low of 70°. 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.
