S
M
T
W
T
F
S
26
88°
65°
27
85°
66°
28
89°
67°
29
89°
66°
30
88°
66°
31
88°
67°
1
87°
66°
2
88°
67°
3
88°
67°
4
89°
66°
5
88°
65°
6
87°
66°
7
89°
66°
8
89°
60°
9
81°
59°
10
81°
59°
11
82°
62°
12
82°
64°
13
84°
65°
14
86°
66°
15
87°
65°
16
85°
63°
17
83°
57°
18
82°
57°
19
82°
64°
20
86°
63°
21
87°
64°
22
86°
62°
23
87°
63°
24
85°
59°
25
80°
57°
26
80°
57°
27
78°
58°
28
78°
56°
29
80°
56°
30
80°
58°
31
85°
62°
1
85°
62°
2
84°
61°
3
85°
55°
4
82°
53°
5
77°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mertztown
Mertztown's August 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 53° and 67°. The average high for August is 85° with an average low of 62°. 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 Mertztown. See also: September | October | November.
