S
M
T
W
T
F
S
26
58°
40°
27
62°
38°
28
63°
50°
29
52°
38°
30
54°
34°
1
51°
32°
2
45°
29°
3
60°
29°
4
72°
43°
5
64°
45°
6
53°
38°
7
54°
34°
8
58°
38°
9
64°
44°
10
58°
37°
11
57°
36°
12
58°
33°
13
61°
43°
14
51°
42°
15
66°
41°
16
70°
46°
17
81°
54°
18
87°
66°
19
85°
47°
20
59°
38°
21
56°
40°
22
55°
48°
23
59°
49°
24
64°
50°
25
64°
52°
26
68°
53°
27
70°
53°
28
70°
52°
29
71°
53°
30
72°
54°
31
73°
48°
1
70°
53°
2
71°
54°
3
72°
53°
4
67°
53°
5
66°
52°
6
71°
55°
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 87°, with overnight lows between 38° and 66°. The average high for May is 69° with an average low of 51°. 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.
