S
M
T
W
T
F
S
26
69°
56°
27
73°
53°
28
71°
46°
29
82°
58°
30
75°
58°
1
64°
53°
2
57°
45°
3
70°
38°
4
81°
49°
5
82°
53°
6
82°
61°
7
78°
56°
8
72°
51°
9
74°
55°
10
84°
60°
11
73°
53°
12
73°
46°
13
80°
46°
14
75°
52°
15
76°
42°
16
88°
54°
17
91°
63°
18
93°
67°
19
93°
64°
20
92°
66°
21
94°
66°
22
79°
66°
23
75°
66°
24
82°
70°
25
81°
70°
26
82°
70°
27
86°
69°
28
89°
68°
29
86°
66°
30
79°
61°
31
75°
59°
1
80°
61°
2
82°
62°
3
85°
63°
4
84°
65°
5
87°
64°
6
82°
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 75° to 89°, with overnight lows between 59° and 70°. The average high for May is 82° with an average low of 65°. 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.
