S
M
T
W
T
F
S
28
91°
72°
29
91°
74°
30
91°
73°
1
92°
70°
2
94°
74°
3
94°
69°
4
92°
70°
5
86°
69°
6
86°
69°
7
88°
67°
8
91°
69°
9
88°
70°
10
86°
69°
11
85°
72°
12
86°
70°
13
87°
69°
14
86°
68°
15
89°
68°
16
90°
69°
17
88°
67°
18
83°
64°
19
86°
70°
20
90°
69°
21
86°
67°
22
84°
66°
23
86°
66°
24
86°
66°
25
87°
66°
26
88°
69°
27
90°
70°
28
90°
70°
29
89°
69°
30
90°
71°
31
90°
70°
1
91°
71°
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 83° to 92°, with overnight lows between 64° and 72°. The average high for July is 88° with an average low of 69°. 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.
