S
M
T
W
T
F
S
28
82°
66°
29
86°
63°
30
90°
66°
1
99°
72°
2
100°
79°
3
100°
73°
4
N/A
5
86°
70°
6
76°
66°
7
74°
65°
8
83°
65°
9
87°
68°
10
90°
68°
11
87°
64°
12
85°
63°
13
86°
63°
14
83°
59°
15
86°
63°
16
88°
66°
17
89°
63°
18
84°
62°
19
88°
66°
20
83°
60°
21
81°
59°
22
82°
60°
23
82°
60°
24
84°
61°
25
85°
63°
26
88°
65°
27
85°
66°
28
89°
67°
29
89°
66°
30
88°
66°
31
88°
67°
1
87°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in Mertztown
Mertztown's July 2026 forecast shows daily high temperatures ranging from 74° to 90°, with overnight lows between 59° and 70°. The average high for July is 85° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Mertztown. See also: August | September | October.
