S
M
T
W
T
F
S
28
75°
51°
29
82°
65°
30
89°
71°
1
84°
57°
2
83°
62°
3
82°
64°
4
74°
56°
5
70°
50°
6
81°
57°
7
82°
58°
8
80°
64°
9
75°
57°
10
76°
56°
11
76°
58°
12
77°
58°
13
79°
60°
14
77°
60°
15
76°
57°
16
75°
55°
17
71°
55°
18
72°
58°
19
72°
58°
20
77°
59°
21
79°
59°
22
79°
58°
23
77°
58°
24
77°
57°
25
78°
59°
26
77°
59°
27
78°
58°
28
79°
59°
29
76°
59°
30
78°
58°
31
72°
56°
1
73°
55°
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 70° to 82°, with overnight lows between 50° and 64°. The average high for July is 77° 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 July weather will actually feel in Mercer. See also: August | September | October.