S
M
T
W
T
F
S
28
90°
76°
29
94°
74°
30
94°
74°
1
91°
72°
2
90°
72°
3
88°
73°
4
89°
70°
5
85°
73°
6
83°
66°
7
83°
67°
8
84°
67°
9
84°
68°
10
86°
74°
11
89°
74°
12
91°
72°
13
88°
71°
14
88°
74°
15
86°
71°
16
86°
69°
17
87°
70°
18
88°
70°
19
89°
74°
20
92°
70°
21
85°
67°
22
85°
68°
23
86°
68°
24
89°
73°
25
92°
75°
26
90°
74°
27
87°
73°
28
85°
71°
29
88°
74°
30
92°
75°
31
91°
75°
1
85°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Affton
Affton's July 2026 forecast shows daily high temperatures ranging from 83° to 94°, with overnight lows between 66° and 76°. The average high for July is 88° with an average low of 72°. 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 Affton. See also: August | September | October.