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°
65°
24
75°
56°
25
75°
54°
26
80°
62°
27
77°
63°
28
81°
58°
29
80°
57°
30
76°
58°
31
77°
59°
1
74°
56°
2
74°
57°
3
73°
55°
4
75°
54°
5
73°
53°
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 73° to 81°, with overnight lows between 53° and 63°. The average high for August is 76° with an average low of 57°. 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.
