S
M
T
W
T
F
S
26
86°
56°
27
86°
64°
28
80°
63°
29
82°
63°
30
81°
66°
31
87°
61°
1
87°
62°
2
84°
73°
3
85°
64°
4
85°
56°
5
84°
66°
6
91°
73°
7
92°
69°
8
86°
68°
9
89°
68°
10
85°
64°
11
84°
68°
12
85°
68°
13
86°
67°
14
85°
67°
15
85°
61°
16
72°
63°
17
87°
66°
18
83°
63°
19
85°
60°
20
78°
60°
21
80°
55°
22
77°
64°
23
80°
61°
24
78°
56°
25
78°
56°
26
82°
56°
27
83°
67°
28
83°
63°
29
78°
57°
30
80°
63°
31
79°
67°
1
89°
70°
2
84°
68°
3
85°
63°
4
80°
60°
5
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lehigh Valley
Lehigh Valley's August 2026 forecast shows daily high temperatures ranging from 76° to 89°, with overnight lows between 56° and 70°. The average high for August is 81° with an average low of 63°. 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 Lehigh Valley. See also: September | October | November.
