S
M
T
W
T
F
S
26
55°
40°
27
52°
41°
28
54°
33°
29
57°
33°
30
55°
35°
1
55°
31°
2
68°
30°
3
72°
49°
4
64°
38°
5
54°
33°
6
56°
25°
7
65°
33°
8
77°
38°
9
64°
39°
10
68°
33°
11
79°
36°
12
75°
51°
13
78°
40°
14
81°
51°
15
89°
44°
16
84°
44°
17
78°
52°
18
55°
46°
19
57°
39°
20
61°
31°
21
69°
45°
22
65°
49°
23
74°
47°
24
85°
47°
25
86°
61°
26
90°
65°
27
90°
63°
28
88°
65°
29
87°
62°
30
83°
60°
31
84°
59°
1
82°
58°
2
83°
54°
3
82°
55°
4
85°
60°
5
87°
63°
6
91°
62°
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 82° to 91°, with overnight lows between 54° and 65°. The average high for May is 86° with an average low of 60°. 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.
