S
M
T
W
T
F
S
26
55°
38°
27
56°
34°
28
59°
39°
29
58°
37°
30
57°
42°
1
58°
46°
2
58°
46°
3
59°
40°
4
58°
37°
5
59°
38°
6
70°
48°
7
71°
43°
8
60°
43°
9
61°
40°
10
60°
42°
11
64°
51°
12
73°
48°
13
62°
45°
14
61°
42°
15
60°
41°
16
64°
50°
17
68°
53°
18
66°
54°
19
72°
50°
20
65°
48°
21
69°
53°
22
75°
54°
23
76°
56°
24
76°
57°
25
78°
56°
26
77°
57°
27
79°
56°
28
78°
51°
29
76°
53°
30
78°
50°
31
77°
47°
1
71°
49°
2
71°
47°
3
72°
50°
4
74°
54°
5
76°
59°
6
82°
52°
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 55° to 82°, with overnight lows between 34° and 59°. The average high for May is 68° with an average low of 48°. 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.
