S
M
T
W
T
F
S
28
82°
67°
29
87°
69°
30
90°
73°
1
98°
80°
2
102°
78°
3
94°
73°
4
90°
69°
5
86°
69°
6
83°
68°
7
81°
68°
8
83°
69°
9
86°
71°
10
89°
69°
11
82°
72°
12
82°
71°
13
82°
65°
14
80°
65°
15
80°
66°
16
81°
66°
17
82°
67°
18
82°
67°
19
83°
69°
20
83°
72°
21
82°
72°
22
87°
72°
23
83°
72°
24
86°
73°
25
88°
73°
26
89°
74°
27
89°
74°
28
88°
73°
29
88°
73°
30
87°
68°
31
81°
66°
1
81°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Mount Vernon
Mount Vernon's July 2026 forecast shows daily high temperatures ranging from 80° to 102°, with overnight lows between 65° and 80°. The average high for July is 86° with an average low of 70°. 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 Mount Vernon. See also: August | September | October.
