S
M
T
W
T
F
S
26
87°
72°
27
89°
72°
28
88°
71°
29
88°
72°
30
90°
73°
31
90°
73°
1
89°
72°
2
88°
70°
3
84°
67°
4
82°
68°
5
82°
67°
6
83°
66°
7
84°
70°
8
86°
71°
9
89°
72°
10
89°
72°
11
88°
71°
12
86°
71°
13
88°
72°
14
89°
70°
15
87°
72°
16
84°
72°
17
85°
71°
18
89°
72°
19
88°
71°
20
88°
65°
21
87°
63°
22
83°
63°
23
82°
64°
24
82°
65°
25
83°
63°
26
83°
69°
27
84°
64°
28
83°
62°
29
82°
63°
30
81°
61°
31
80°
61°
1
80°
62°
2
81°
63°
3
79°
65°
4
79°
62°
5
81°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Merion
Merion's August 2026 forecast shows daily high temperatures ranging from 79° to 90°, with overnight lows between 61° and 73°. The average high for August is 85° 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 Merion. See also: September | October | November.
