S
M
T
W
T
F
S
26
80°
62°
27
85°
65°
28
85°
65°
29
80°
64°
30
84°
60°
31
80°
58°
1
79°
58°
2
81°
59°
3
82°
64°
4
85°
65°
5
86°
65°
6
86°
63°
7
83°
61°
8
85°
63°
9
84°
61°
10
85°
55°
11
79°
57°
12
80°
58°
13
79°
56°
14
82°
56°
15
79°
58°
16
77°
62°
17
78°
61°
18
79°
59°
19
78°
56°
20
78°
56°
21
79°
61°
22
80°
61°
23
78°
59°
24
82°
60°
25
83°
54°
26
83°
53°
27
77°
54°
28
76°
56°
29
77°
57°
30
76°
58°
31
77°
59°
1
81°
53°
2
76°
53°
3
76°
54°
4
75°
52°
5
75°
51°
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 75° to 86°, with overnight lows between 51° and 65°. The average high for August is 80° with an average low of 59°. 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.
