S
M
T
W
T
F
S
26
56°
25°
27
48°
35°
28
46°
24°
29
46°
28°
30
43°
31°
1
57°
25°
2
71°
41°
3
73°
33°
4
49°
34°
5
37°
30°
6
48°
32°
7
59°
27°
8
64°
32°
9
57°
31°
10
57°
36°
11
67°
44°
12
65°
39°
13
70°
49°
14
74°
47°
15
77°
47°
16
70°
45°
17
69°
45°
18
74°
47°
19
68°
46°
20
67°
47°
21
68°
44°
22
66°
46°
23
62°
49°
24
64°
50°
25
70°
51°
26
67°
51°
27
68°
52°
28
73°
53°
29
74°
53°
30
74°
52°
31
72°
51°
1
72°
54°
2
75°
54°
3
75°
52°
4
65°
45°
5
64°
44°
6
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Penn
Penn's May 2026 forecast shows daily high temperatures ranging from 57° to 77°, with overnight lows between 31° and 54°. The average high for May is 68° with an average low of 47°. 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 Penn. See also: June | July | August.
