S
M
T
W
T
F
S
28
93°
73°
29
93°
73°
30
96°
77°
1
95°
74°
2
96°
72°
3
93°
75°
4
91°
71°
5
87°
68°
6
87°
69°
7
88°
71°
8
87°
70°
9
85°
72°
10
88°
71°
11
80°
68°
12
87°
66°
13
89°
67°
14
90°
71°
15
90°
73°
16
90°
72°
17
93°
73°
18
92°
70°
19
89°
69°
20
92°
69°
21
89°
67°
22
90°
69°
23
91°
69°
24
89°
68°
25
93°
72°
26
92°
73°
27
88°
72°
28
91°
71°
29
86°
67°
30
84°
71°
31
85°
67°
1
87°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Caseyville
Caseyville's July 2026 forecast shows daily high temperatures ranging from 80° to 93°, with overnight lows between 66° and 73°. The average high for July is 89° 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 Caseyville. See also: August | September | October.
