S
M
T
W
T
F
S
28
66°
54°
29
66°
55°
30
63°
52°
1
62°
51°
2
64°
50°
3
65°
51°
4
66°
51°
5
69°
53°
6
71°
52°
7
73°
53°
8
72°
55°
9
66°
55°
10
71°
52°
11
74°
54°
12
75°
53°
13
76°
58°
14
77°
58°
15
76°
56°
16
75°
56°
17
75°
57°
18
77°
58°
19
77°
58°
20
76°
57°
21
78°
59°
22
75°
54°
23
74°
55°
24
77°
56°
25
76°
55°
26
78°
58°
27
78°
58°
28
79°
57°
29
79°
59°
30
78°
58°
31
72°
54°
1
71°
52°
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 62° to 79°, with overnight lows between 50° and 59°. The average high for July is 73° with an average low of 55°. 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.
