S
M
T
W
T
F
S
26
83°
62°
27
89°
62°
28
82°
68°
29
82°
60°
30
72°
57°
1
61°
51°
2
70°
42°
3
70°
45°
4
75°
48°
5
79°
54°
6
80°
64°
7
76°
56°
8
72°
49°
9
73°
52°
10
78°
54°
11
81°
60°
12
84°
58°
13
79°
62°
14
83°
63°
15
84°
63°
16
84°
62°
17
85°
64°
18
85°
64°
19
84°
63°
20
86°
64°
21
86°
65°
22
85°
65°
23
81°
64°
24
82°
65°
25
83°
65°
26
82°
64°
27
82°
63°
28
81°
60°
29
86°
65°
30
87°
63°
31
85°
65°
1
85°
65°
2
88°
67°
3
88°
67°
4
89°
66°
5
83°
63°
6
83°
64°
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 61° to 89°, with overnight lows between 42° and 67°. The average high for May is 81° with an average low of 60°. 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.
