S
M
T
W
T
F
S
28
77°
58°
29
81°
60°
30
78°
57°
1
77°
58°
2
79°
59°
3
81°
56°
4
72°
55°
5
73°
56°
6
74°
58°
7
76°
59°
8
79°
59°
9
80°
60°
10
78°
60°
11
78°
59°
12
79°
61°
13
75°
60°
14
74°
60°
15
74°
59°
16
75°
60°
17
76°
59°
18
78°
60°
19
81°
61°
20
79°
61°
21
75°
60°
22
74°
60°
23
74°
61°
24
79°
61°
25
81°
62°
26
81°
62°
27
78°
61°
28
76°
61°
29
74°
60°
30
74°
62°
31
80°
62°
1
81°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in St.-Charles
St.-Charles's July 2026 forecast shows daily high temperatures ranging from 72° to 81°, with overnight lows between 55° and 62°. The average high for July is 77° 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 St.-Charles. See also: August | September | October.
