S
M
T
W
T
F
S
26
81°
59°
27
82°
62°
28
73°
65°
29
79°
64°
30
70°
59°
1
62°
54°
2
69°
48°
3
71°
45°
4
77°
46°
5
77°
52°
6
75°
62°
7
70°
60°
8
66°
56°
9
70°
59°
10
79°
60°
11
78°
64°
12
76°
58°
13
78°
54°
14
75°
54°
15
77°
50°
16
81°
55°
17
83°
60°
18
85°
63°
19
86°
68°
20
86°
69°
21
84°
69°
22
77°
68°
23
80°
69°
24
80°
70°
25
77°
70°
26
78°
69°
27
83°
70°
28
83°
64°
29
79°
63°
30
80°
62°
31
81°
60°
1
81°
59°
2
81°
58°
3
82°
59°
4
81°
61°
5
85°
62°
6
82°
63°
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 77° to 85°, with overnight lows between 58° and 70°. The average high for May is 81° with an average low of 64°. 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.
