S
M
T
W
T
F
S
26
89°
74°
27
91°
74°
28
91°
73°
29
90°
74°
30
91°
75°
31
90°
75°
1
91°
74°
2
92°
75°
3
92°
76°
4
93°
75°
5
93°
76°
6
92°
76°
7
93°
75°
8
93°
74°
9
91°
74°
10
90°
73°
11
91°
74°
12
91°
75°
13
92°
75°
14
92°
74°
15
91°
74°
16
91°
72°
17
90°
68°
18
91°
71°
19
91°
68°
20
86°
67°
21
90°
70°
22
88°
71°
23
85°
68°
24
85°
65°
25
86°
65°
26
84°
66°
27
84°
64°
28
85°
64°
29
84°
65°
30
84°
65°
31
88°
66°
1
87°
65°
2
89°
66°
3
89°
69°
4
88°
69°
5
89°
68°
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 93°, with overnight lows between 64° and 76°. The average high for August is 89° 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.
