S
M
T
W
T
F
S
26
79°
55°
27
82°
49°
28
75°
54°
29
74°
54°
30
68°
46°
1
67°
46°
2
61°
36°
3
62°
45°
4
73°
51°
5
79°
57°
6
70°
52°
7
62°
37°
8
59°
39°
9
67°
45°
10
70°
47°
11
72°
48°
12
73°
50°
13
72°
49°
14
70°
48°
15
76°
55°
16
77°
55°
17
78°
54°
18
74°
55°
19
75°
55°
20
78°
54°
21
79°
56°
22
80°
56°
23
80°
57°
24
76°
57°
25
78°
56°
26
77°
58°
27
78°
57°
28
74°
56°
29
78°
57°
30
76°
56°
31
76°
55°
1
79°
58°
2
81°
59°
3
82°
59°
4
82°
58°
5
75°
54°
6
74°
53°
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 59° to 82°, with overnight lows between 36° and 59°. The average high for May is 74° with an average low of 52°. 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.
