S
M
T
W
T
F
S
26
58°
43°
27
70°
39°
28
57°
47°
29
57°
51°
30
65°
43°
1
63°
37°
2
57°
43°
3
61°
40°
4
74°
38°
5
82°
54°
6
72°
55°
7
66°
50°
8
68°
40°
9
62°
49°
10
68°
49°
11
63°
45°
12
68°
38°
13
71°
52°
14
58°
49°
15
71°
49°
16
81°
48°
17
86°
59°
18
94°
63°
19
93°
68°
20
88°
66°
21
67°
54°
22
65°
53°
23
53°
48°
24
61°
50°
25
78°
59°
26
80°
57°
27
83°
66°
28
76°
53°
29
78°
50°
30
68°
49°
31
78°
51°
1
77°
54°
2
76°
53°
3
82°
56°
4
84°
59°
5
86°
64°
6
83°
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 68° to 86°, with overnight lows between 49° and 64°. The average high for May is 79° with an average low of 56°. 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.
