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
83°
64°
16
74°
66°
17
84°
63°
18
84°
60°
19
84°
65°
20
79°
58°
21
76°
56°
22
74°
57°
23
75°
58°
24
78°
58°
25
84°
60°
26
82°
58°
27
82°
56°
28
77°
57°
29
76°
53°
30
81°
59°
31
74°
52°
1
74°
52°
2
75°
53°
3
74°
57°
4
74°
56°
5
75°
55°
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 84°, with overnight lows between 52° and 66°. The average high for August is 78° with an average low of 58°. 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.
