S
M
T
W
T
F
S
26
106°
66°
27
94°
72°
28
97°
67°
29
93°
64°
30
97°
63°
31
91°
59°
1
95°
56°
2
106°
73°
3
98°
54°
4
77°
56°
5
83°
57°
6
91°
62°
7
100°
67°
8
103°
66°
9
101°
68°
10
99°
63°
11
96°
63°
12
94°
61°
13
90°
62°
14
87°
60°
15
88°
61°
16
90°
60°
17
88°
59°
18
88°
58°
19
83°
58°
20
86°
57°
21
88°
58°
22
86°
57°
23
85°
57°
24
88°
56°
25
88°
52°
26
80°
54°
27
87°
56°
28
88°
58°
29
88°
57°
30
89°
58°
31
89°
57°
1
88°
56°
2
88°
57°
3
87°
56°
4
85°
55°
5
84°
55°
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 77° to 106°, with overnight lows between 52° and 73°. The average high for August is 90° with an average low of 59°. 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.
