S
M
T
W
T
F
S
28
91°
73°
29
93°
73°
30
94°
74°
1
91°
74°
2
93°
72°
3
93°
75°
4
89°
73°
5
86°
69°
6
85°
69°
7
86°
71°
8
89°
69°
9
87°
69°
10
87°
70°
11
82°
70°
12
86°
69°
13
87°
67°
14
89°
66°
15
91°
69°
16
88°
73°
17
90°
73°
18
93°
75°
19
90°
74°
20
91°
69°
21
90°
71°
22
81°
65°
23
80°
60°
24
75°
60°
25
88°
67°
26
96°
73°
27
95°
77°
28
90°
71°
29
84°
67°
30
86°
62°
31
78°
68°
1
76°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Alton
Alton's July 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for July is ° with an average low of °. 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 Alton. See also: August | September | October.
