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
85°
68°
9
88°
62°
10
89°
67°
11
85°
65°
12
81°
61°
13
84°
62°
14
81°
58°
15
78°
59°
16
77°
58°
17
77°
55°
18
76°
57°
19
77°
57°
20
76°
56°
21
75°
58°
22
80°
60°
23
84°
62°
24
76°
55°
25
78°
56°
26
82°
59°
27
83°
61°
28
84°
59°
29
82°
54°
30
75°
53°
31
74°
53°
1
76°
58°
2
76°
58°
3
78°
57°
4
77°
59°
5
80°
59°
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 74° to 89°, with overnight lows between 53° and 68°. 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.
