S
M
T
W
T
F
S
28
83°
69°
29
88°
68°
30
91°
74°
1
95°
77°
2
104°
82°
3
101°
78°
4
96°
75°
5
91°
69°
6
83°
68°
7
85°
69°
8
84°
68°
9
87°
71°
10
88°
72°
11
88°
72°
12
91°
73°
13
90°
73°
14
91°
69°
15
80°
66°
16
81°
66°
17
85°
68°
18
83°
68°
19
87°
70°
20
86°
72°
21
81°
72°
22
82°
71°
23
83°
72°
24
82°
72°
25
83°
71°
26
84°
71°
27
86°
72°
28
86°
71°
29
85°
72°
30
87°
73°
31
88°
73°
1
87°
72°
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 80° to 104°, with overnight lows between 66° and 82°. The average high for July is 87° with an average low of 72°. 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.
