S
M
T
W
T
F
S
26
63°
51°
27
69°
53°
28
63°
50°
29
64°
49°
30
63°
51°
1
66°
50°
2
66°
46°
3
67°
48°
4
70°
56°
5
71°
56°
6
67°
53°
7
67°
52°
8
72°
52°
9
67°
53°
10
69°
59°
11
78°
56°
12
69°
54°
13
70°
59°
14
79°
59°
15
71°
55°
16
71°
54°
17
72°
57°
18
77°
61°
19
80°
58°
20
79°
53°
21
70°
53°
22
72°
58°
23
72°
54°
24
76°
60°
25
81°
63°
26
82°
62°
27
74°
60°
28
74°
63°
29
75°
63°
30
74°
62°
31
75°
64°
1
84°
65°
2
83°
64°
3
84°
66°
4
83°
65°
5
84°
64°
6
85°
61°
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 63° to 85°, with overnight lows between 46° and 66°. The average high for May is 73° with an average low of 57°. 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.
