S
M
T
W
T
F
S
26
77°
55°
27
74°
53°
28
73°
52°
29
72°
52°
30
70°
53°
1
73°
50°
2
74°
51°
3
72°
49°
4
72°
48°
5
73°
48°
6
72°
49°
7
74°
56°
8
80°
57°
9
81°
58°
10
83°
57°
11
78°
55°
12
75°
50°
13
73°
50°
14
75°
51°
15
78°
58°
16
80°
55°
17
80°
59°
18
85°
60°
19
82°
59°
20
80°
61°
21
81°
61°
22
79°
62°
23
84°
62°
24
85°
63°
25
86°
63°
26
86°
62°
27
87°
64°
28
87°
63°
29
88°
64°
30
89°
63°
31
87°
62°
1
88°
58°
2
87°
59°
3
82°
64°
4
82°
63°
5
83°
64°
6
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harrisburg
Harrisburg's May 2026 forecast shows daily high temperatures ranging from 70° to 89°, with overnight lows between 48° and 64°. The average high for May is 80° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Harrisburg. See also: June | July | August.
