S
M
T
W
T
F
S
26
92°
74°
27
91°
75°
28
91°
75°
29
89°
74°
30
85°
74°
31
87°
73°
1
84°
73°
2
85°
74°
3
85°
74°
4
90°
73°
5
85°
72°
6
84°
69°
7
85°
72°
8
84°
73°
9
85°
72°
10
85°
70°
11
86°
69°
12
85°
70°
13
85°
73°
14
86°
73°
15
90°
74°
16
91°
74°
17
91°
73°
18
90°
74°
19
92°
74°
20
92°
72°
21
85°
64°
22
83°
64°
23
83°
66°
24
84°
65°
25
85°
66°
26
89°
70°
27
91°
71°
28
91°
71°
29
90°
70°
30
91°
68°
31
89°
64°
1
86°
68°
2
90°
70°
3
91°
70°
4
91°
71°
5
90°
69°
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 92°, with overnight lows between 64° and 75°. The average high for August is 88° with an average low of 71°. 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.
