S
M
T
W
T
F
S
26
63°
38°
27
57°
38°
28
59°
37°
29
58°
38°
30
61°
39°
1
64°
42°
2
64°
46°
3
59°
47°
4
58°
47°
5
63°
43°
6
70°
48°
7
63°
49°
8
65°
43°
9
59°
40°
10
60°
41°
11
68°
44°
12
61°
44°
13
60°
41°
14
65°
47°
15
68°
52°
16
70°
54°
17
73°
48°
18
65°
43°
19
63°
44°
20
65°
53°
21
73°
54°
22
76°
55°
23
77°
58°
24
76°
57°
25
76°
56°
26
69°
54°
27
70°
56°
28
70°
56°
29
69°
57°
30
69°
55°
31
71°
51°
1
69°
49°
2
72°
49°
3
73°
52°
4
77°
53°
5
74°
50°
6
71°
51°
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 57° to 77°, with overnight lows between 37° and 58°. The average high for May is 67° 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.
