S
M
T
W
T
F
S
28
81°
68°
29
87°
67°
30
91°
71°
1
98°
75°
2
103°
78°
3
103°
78°
4
97°
75°
5
99°
70°
6
96°
71°
7
86°
68°
8
87°
68°
9
88°
70°
10
90°
69°
11
90°
71°
12
89°
72°
13
85°
66°
14
82°
65°
15
82°
65°
16
83°
66°
17
83°
67°
18
84°
67°
19
84°
72°
20
86°
72°
21
86°
71°
22
89°
72°
23
86°
72°
24
85°
71°
25
88°
72°
26
89°
73°
27
89°
72°
28
88°
71°
29
86°
72°
30
87°
68°
31
82°
66°
1
82°
66°
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 81° to 103°, with overnight lows between 65° and 78°. The average high for July is 88° 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.
