S
M
T
W
T
F
S
26
56°
25°
27
48°
35°
28
46°
24°
29
46°
28°
30
43°
31°
1
57°
36°
2
65°
35°
3
70°
40°
4
47°
30°
5
47°
29°
6
48°
30°
7
60°
39°
8
63°
37°
9
60°
38°
10
61°
38°
11
60°
39°
12
60°
41°
13
66°
41°
14
65°
40°
15
57°
35°
16
59°
44°
17
59°
45°
18
65°
43°
19
66°
44°
20
60°
37°
21
60°
40°
22
61°
41°
23
61°
41°
24
62°
42°
25
62°
44°
26
67°
46°
27
66°
50°
28
67°
47°
29
73°
44°
30
63°
42°
31
65°
51°
1
64°
50°
2
65°
53°
3
64°
53°
4
66°
52°
5
65°
53°
6
66°
54°
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 47° to 73°, with overnight lows between 29° and 54°. The average high for May is 62° with an average low of 42°. 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.
