S
M
T
W
T
F
S
28
82°
65°
29
87°
67°
30
88°
67°
1
88°
66°
2
87°
66°
3
84°
67°
4
84°
67°
5
81°
64°
6
81°
62°
7
80°
67°
8
81°
66°
9
82°
62°
10
82°
63°
11
83°
60°
12
82°
59°
13
81°
58°
14
83°
59°
15
85°
63°
16
86°
60°
17
85°
60°
18
87°
59°
19
Hist. Avg.
84°
64°
20
Hist. Avg.
84°
64°
21
Hist. Avg.
84°
64°
22
Hist. Avg.
84°
64°
23
Hist. Avg.
84°
64°
24
Hist. Avg.
84°
64°
25
Hist. Avg.
84°
64°
26
Hist. Avg.
84°
64°
27
Hist. Avg.
84°
64°
28
Hist. Avg.
84°
64°
29
Hist. Avg.
84°
64°
30
Hist. Avg.
83°
64°
31
Hist. Avg.
83°
64°
1
Hist. Avg.
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in St. Charles
St. Charles's July 2026 forecast shows daily high temperatures ranging from 80° to 88°, with overnight lows between 58° and 67°. The average high for July is 84° 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.
