S
M
T
W
T
F
S
28
94°
72°
29
95°
73°
30
97°
74°
1
96°
71°
2
98°
72°
3
97°
72°
4
94°
70°
5
86°
68°
6
86°
66°
7
89°
65°
8
91°
70°
9
94°
72°
10
91°
69°
11
86°
64°
12
90°
65°
13
88°
66°
14
89°
65°
15
91°
65°
16
89°
68°
17
93°
69°
18
99°
78°
19
86°
71°
20
89°
70°
21
86°
68°
22
83°
66°
23
85°
67°
24
85°
68°
25
86°
69°
26
87°
70°
27
88°
71°
28
89°
71°
29
89°
70°
30
88°
71°
31
86°
70°
1
89°
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 99°, with overnight lows between 64° and 78°. The average high for July is 89° 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.
