S
M
T
W
T
F
S
26
59°
39°
27
70°
34°
28
61°
37°
29
63°
46°
30
61°
46°
1
63°
45°
2
58°
37°
3
58°
38°
4
69°
48°
5
78°
56°
6
67°
51°
7
60°
39°
8
56°
40°
9
60°
46°
10
64°
48°
11
64°
48°
12
65°
49°
13
63°
48°
14
66°
49°
15
66°
51°
16
67°
51°
17
67°
50°
18
68°
55°
19
75°
55°
20
74°
54°
21
73°
56°
22
76°
55°
23
76°
55°
24
77°
54°
25
71°
50°
26
69°
54°
27
70°
57°
28
76°
58°
29
76°
58°
30
77°
57°
31
75°
57°
1
73°
51°
2
69°
51°
3
69°
52°
4
72°
51°
5
71°
51°
6
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Pennsburg
Pennsburg's May 2026 forecast shows daily high temperatures ranging from 56° to 78°, with overnight lows between 37° and 58°. The average high for May is 69° with an average low of 51°. 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 Pennsburg. See also: June | July | August.