S
M
T
W
T
F
S
28
79°
70°
29
84°
63°
30
89°
59°
1
89°
77°
2
93°
78°
3
95°
78°
4
101°
78°
5
93°
77°
6
94°
70°
7
89°
69°
8
87°
66°
9
88°
68°
10
87°
69°
11
90°
67°
12
90°
68°
13
91°
70°
14
90°
67°
15
85°
64°
16
86°
65°
17
88°
68°
18
87°
69°
19
90°
70°
20
91°
70°
21
87°
69°
22
87°
70°
23
88°
71°
24
91°
70°
25
91°
70°
26
90°
71°
27
91°
71°
28
90°
70°
29
91°
70°
30
92°
71°
31
93°
71°
1
92°
70°
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 85° to 101°, with overnight lows between 64° and 78°. The average high for July is 90° 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.
