S
M
T
W
T
F
S
28
83°
69°
29
88°
68°
30
91°
74°
1
93°
77°
2
104°
84°
3
100°
79°
4
96°
76°
5
88°
69°
6
78°
68°
7
77°
65°
8
79°
68°
9
88°
73°
10
87°
70°
11
85°
69°
12
84°
69°
13
84°
69°
14
82°
68°
15
84°
70°
16
89°
69°
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 77° to 100°, with overnight lows between 65° and 79°. The average high for July is 85° with an average low of 71°. 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.
