S
M
T
W
T
F
S
28
82°
58°
29
89°
66°
30
92°
76°
1
94°
78°
2
96°
74°
3
88°
69°
4
81°
65°
5
81°
63°
6
80°
60°
7
83°
63°
8
85°
63°
9
86°
64°
10
83°
62°
11
82°
60°
12
84°
61°
13
84°
63°
14
85°
62°
15
81°
59°
16
78°
60°
17
76°
56°
18
79°
61°
19
81°
63°
20
84°
63°
21
84°
62°
22
82°
64°
23
83°
63°
24
81°
63°
25
83°
62°
26
84°
64°
27
85°
64°
28
84°
65°
29
85°
63°
30
84°
64°
31
84°
63°
1
80°
62°
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 76° to 96°, with overnight lows between 56° and 74°. The average high for July is 83° with an average low of 63°. 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.
