S
M
T
W
T
F
S
26
69°
50°
27
69°
51°
28
73°
54°
29
77°
57°
30
74°
57°
1
74°
56°
2
69°
53°
3
68°
51°
4
68°
49°
5
71°
57°
6
78°
58°
7
79°
59°
8
79°
57°
9
71°
53°
10
70°
53°
11
71°
58°
12
74°
59°
13
75°
60°
14
81°
62°
15
81°
62°
16
80°
61°
17
78°
61°
18
75°
57°
19
73°
53°
20
74°
60°
21
76°
62°
22
78°
56°
23
78°
57°
24
80°
58°
25
79°
57°
26
77°
56°
27
78°
60°
28
78°
63°
29
84°
63°
30
83°
57°
31
81°
58°
1
79°
57°
2
81°
63°
3
86°
66°
4
86°
66°
5
85°
65°
6
88°
66°
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 88°, with overnight lows between 49° and 66°. The average high for May is 77° with an average low of 58°. 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.
