S
M
T
W
T
F
S
28
91°
72°
29
93°
72°
30
93°
72°
1
94°
71°
2
95°
72°
3
94°
72°
4
90°
72°
5
91°
71°
6
90°
70°
7
92°
71°
8
90°
70°
9
91°
71°
10
89°
70°
11
87°
70°
12
88°
70°
13
91°
71°
14
91°
70°
15
90°
67°
16
88°
66°
17
86°
64°
18
86°
65°
19
91°
70°
20
92°
71°
21
92°
71°
22
91°
70°
23
92°
71°
24
93°
72°
25
94°
72°
26
93°
71°
27
94°
72°
28
94°
72°
29
93°
71°
30
94°
72°
31
93°
71°
1
90°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Mercer
Mercer's July 2026 forecast shows daily high temperatures ranging from 86° to 95°, with overnight lows between 64° and 72°. The average high for July is 91° with an average low of 70°. 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 Mercer. See also: August | September | October.