S
M
T
W
T
F
S
28
79°
70°
29
84°
63°
30
89°
59°
1
90°
69°
2
97°
74°
3
101°
77°
4
102°
75°
5
97°
75°
6
86°
76°
7
85°
72°
8
84°
69°
9
89°
68°
10
91°
73°
11
91°
72°
12
86°
67°
13
84°
64°
14
87°
76°
15
92°
78°
16
96°
76°
17
97°
69°
18
97°
74°
19
94°
73°
20
95°
72°
21
91°
68°
22
88°
67°
23
87°
69°
24
89°
68°
25
88°
69°
26
89°
68°
27
87°
70°
28
89°
71°
29
92°
67°
30
86°
69°
31
86°
70°
1
87°
69°
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 84° to 97°, 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.
