S
M
T
W
T
F
S
28
87°
76°
29
79°
63°
30
80°
63°
1
80°
64°
2
81°
71°
3
85°
70°
4
81°
70°
5
82°
69°
6
84°
71°
7
88°
72°
8
88°
71°
9
87°
71°
10
88°
72°
11
85°
70°
12
87°
71°
13
86°
71°
14
82°
70°
15
82°
70°
16
84°
69°
17
82°
65°
18
81°
67°
19
80°
64°
20
81°
64°
21
81°
64°
22
82°
65°
23
81°
65°
24
82°
66°
25
82°
67°
26
83°
69°
27
83°
64°
28
82°
63°
29
83°
67°
30
85°
65°
31
85°
65°
1
87°
64°
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 79° to 88°, with overnight lows between 63° and 76°. The average high for July is 83° with an average low of 68°. 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.
