S
M
T
W
T
F
S
26
83°
62°
27
89°
62°
28
82°
68°
29
80°
64°
30
68°
59°
1
60°
53°
2
71°
48°
3
76°
43°
4
80°
45°
5
79°
52°
6
76°
66°
7
70°
58°
8
65°
58°
9
72°
62°
10
82°
63°
11
76°
63°
12
83°
61°
13
85°
57°
14
80°
55°
15
87°
62°
16
85°
60°
17
86°
67°
18
85°
65°
19
87°
66°
20
83°
66°
21
82°
64°
22
82°
64°
23
80°
59°
24
82°
60°
25
83°
61°
26
87°
62°
27
83°
66°
28
87°
65°
29
87°
66°
30
82°
66°
31
83°
63°
1
84°
64°
2
86°
66°
3
88°
67°
4
89°
67°
5
90°
68°
6
89°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Philadelphia
Philadelphia's May 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 55° and 68°. The average high for May is 85° with an average low of 64°. 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 Philadelphia. See also: June | July | August.
