S
M
T
W
T
F
S
28
85°
67°
29
89°
66°
30
90°
72°
1
93°
73°
2
92°
72°
3
94°
71°
4
90°
69°
5
87°
68°
6
86°
66°
7
87°
70°
8
88°
65°
9
87°
67°
10
84°
67°
11
78°
68°
12
87°
66°
13
89°
65°
14
92°
69°
15
94°
69°
16
93°
68°
17
90°
69°
18
84°
66°
19
83°
66°
20
84°
62°
21
81°
57°
22
78°
56°
23
79°
61°
24
82°
60°
25
82°
62°
26
83°
59°
27
80°
62°
28
80°
59°
29
77°
56°
30
77°
62°
31
78°
60°
1
80°
62°
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 77° to 94°, with overnight lows between 56° and 69°. 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 Mount Vernon. See also: August | September | October.
