S
M
T
W
T
F
S
28
86°
64°
29
95°
77°
30
95°
79°
1
95°
79°
2
97°
79°
3
93°
70°
4
88°
70°
5
73°
68°
6
77°
70°
7
82°
68°
8
91°
66°
9
90°
72°
10
81°
72°
11
81°
72°
12
84°
68°
13
90°
71°
14
93°
73°
15
93°
72°
16
94°
72°
17
92°
74°
18
90°
69°
19
87°
67°
20
82°
64°
21
79°
63°
22
81°
63°
23
82°
62°
24
82°
64°
25
85°
64°
26
84°
63°
27
86°
67°
28
86°
62°
29
79°
60°
30
78°
61°
31
81°
63°
1
85°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Merrillville
Merrillville's July 2026 forecast shows daily high temperatures ranging from 78° to 94°, with overnight lows between 60° and 74°. The average high for July is 85° with an average low of 66°. 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 Merrillville. See also: August | September | October.
