S
M
T
W
T
F
S
28
80°
63°
29
85°
67°
30
93°
71°
1
96°
71°
2
95°
69°
3
94°
68°
4
88°
65°
5
87°
63°
6
83°
62°
7
82°
59°
8
83°
60°
9
81°
60°
10
82°
57°
11
79°
60°
12
81°
59°
13
77°
54°
14
75°
53°
15
76°
53°
16
77°
54°
17
77°
55°
18
78°
58°
19
78°
60°
20
82°
61°
21
82°
61°
22
80°
60°
23
78°
61°
24
81°
60°
25
83°
61°
26
84°
62°
27
84°
62°
28
82°
61°
29
80°
57°
30
78°
54°
31
76°
54°
1
75°
53°
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 75° to 96°, with overnight lows between 53° and 71°. The average high for July is 82° with an average low of 60°. 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.