S
M
T
W
T
F
S
26
62°
43°
27
61°
41°
28
59°
38°
29
60°
37°
30
60°
36°
1
61°
36°
2
60°
38°
3
62°
44°
4
63°
40°
5
60°
38°
6
60°
38°
7
61°
43°
8
66°
39°
9
62°
40°
10
60°
39°
11
61°
39°
12
63°
45°
13
73°
52°
14
74°
52°
15
75°
51°
16
75°
48°
17
65°
46°
18
69°
50°
19
74°
53°
20
76°
53°
21
75°
48°
22
66°
46°
23
67°
45°
24
66°
45°
25
73°
52°
26
78°
54°
27
80°
56°
28
78°
54°
29
75°
56°
30
70°
48°
31
73°
53°
1
76°
48°
2
71°
47°
3
69°
46°
4
70°
49°
5
72°
52°
6
76°
58°
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 59° to 80°, with overnight lows between 36° and 58°. The average high for May is 68° with an average low of 46°. 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.
