S
M
T
W
T
F
S
26
44°
34°
27
49°
32°
28
54°
33°
29
64°
25°
30
59°
32°
1
67°
27°
2
78°
27°
3
75°
36°
4
68°
36°
5
46°
37°
6
55°
30°
7
71°
33°
8
74°
46°
9
72°
48°
10
72°
40°
11
90°
46°
12
78°
53°
13
92°
47°
14
86°
49°
15
86°
45°
16
83°
55°
17
65°
51°
18
47°
35°
19
60°
30°
20
63°
44°
21
70°
39°
22
67°
42°
23
78°
38°
24
88°
45°
25
90°
51°
26
87°
57°
27
78°
56°
28
71°
55°
29
80°
54°
30
78°
49°
31
80°
53°
1
75°
52°
2
76°
51°
3
80°
58°
4
87°
56°
5
88°
59°
6
90°
59°
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 71° to 90°, with overnight lows between 49° and 59°. The average high for May is 80° with an average low of 55°. 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.
