S
M
T
W
T
F
S
26
63°
45°
27
79°
43°
28
72°
55°
29
61°
46°
30
55°
41°
1
52°
37°
2
48°
32°
3
61°
32°
4
72°
45°
5
70°
48°
6
57°
41°
7
57°
41°
8
66°
41°
9
70°
52°
10
66°
52°
11
70°
39°
12
72°
41°
13
64°
46°
14
63°
45°
15
68°
39°
16
77°
50°
17
86°
59°
18
87°
68°
19
87°
62°
20
67°
45°
21
67°
54°
22
64°
63°
23
76°
59°
24
77°
60°
25
78°
59°
26
79°
58°
27
77°
58°
28
78°
57°
29
79°
56°
30
80°
56°
31
81°
54°
1
79°
59°
2
78°
59°
3
77°
56°
4
73°
53°
5
74°
53°
6
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mechanicsburg
Mechanicsburg's May 2026 forecast shows daily high temperatures ranging from 64° to 87°, with overnight lows between 45° and 68°. The average high for May is 77° with an average low of 57°. 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 Mechanicsburg. See also: June | July | August.
