S
M
T
W
T
F
S
28
87°
68°
29
92°
71°
30
93°
70°
1
95°
69°
2
99°
70°
3
97°
70°
4
90°
69°
5
89°
68°
6
82°
69°
7
86°
67°
8
86°
68°
9
88°
68°
10
83°
70°
11
78°
68°
12
80°
63°
13
81°
64°
14
82°
67°
15
84°
64°
16
84°
65°
17
85°
67°
18
84°
66°
19
84°
69°
20
86°
67°
21
82°
64°
22
83°
64°
23
85°
66°
24
86°
68°
25
80°
67°
26
80°
67°
27
81°
68°
28
83°
68°
29
83°
67°
30
85°
69°
31
85°
68°
1
82°
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 78° to 89°, with overnight lows between 63° and 70°. The average high for July is 83° with an average low of 67°. 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.
