S
M
T
W
T
F
S
26
81°
55°
27
87°
47°
28
83°
53°
29
84°
50°
30
83°
52°
31
91°
45°
1
79°
52°
2
77°
48°
3
85°
47°
4
97°
56°
5
102°
55°
6
100°
56°
7
97°
56°
8
92°
53°
9
85°
52°
10
85°
53°
11
87°
56°
12
85°
55°
13
87°
54°
14
83°
54°
15
85°
53°
16
86°
56°
17
83°
52°
18
80°
53°
19
81°
52°
20
78°
50°
21
77°
53°
22
77°
49°
23
78°
55°
24
77°
48°
25
84°
53°
26
85°
55°
27
84°
55°
28
82°
54°
29
77°
54°
30
76°
47°
31
75°
51°
1
74°
49°
2
75°
47°
3
75°
49°
4
76°
49°
5
74°
50°
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 74° to 102°, with overnight lows between 47° and 56°. The average high for August is 83° with an average low of 53°. 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.
