S
M
T
W
T
F
S
26
86°
68°
27
90°
71°
28
87°
71°
29
86°
69°
30
86°
71°
31
87°
71°
1
87°
70°
2
89°
71°
3
90°
71°
4
90°
70°
5
89°
70°
6
89°
69°
7
90°
71°
8
90°
70°
9
91°
71°
10
91°
71°
11
90°
70°
12
88°
71°
13
88°
70°
14
85°
67°
15
84°
64°
16
83°
64°
17
84°
68°
18
83°
67°
19
85°
67°
20
86°
69°
21
84°
69°
22
84°
67°
23
86°
69°
24
90°
67°
25
88°
67°
26
85°
68°
27
84°
65°
28
86°
67°
29
87°
66°
30
85°
66°
31
84°
68°
1
84°
68°
2
85°
67°
3
84°
67°
4
83°
64°
5
82°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Philadelphia
Philadelphia's August 2026 forecast shows daily high temperatures ranging from 82° to 91°, with overnight lows between 59° and 71°. The average high for August is 87° with an average low of 68°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Philadelphia. See also: September | October | November.
