S
M
T
W
T
F
S
28
66°
54°
29
63°
55°
30
63°
54°
1
68°
52°
2
66°
49°
3
71°
54°
4
67°
52°
5
73°
48°
6
82°
51°
7
72°
52°
8
72°
54°
9
75°
50°
10
72°
57°
11
75°
55°
12
71°
52°
13
77°
48°
14
82°
51°
15
80°
54°
16
73°
55°
17
74°
52°
18
76°
53°
19
79°
55°
20
79°
57°
21
79°
57°
22
76°
56°
23
77°
54°
24
76°
57°
25
74°
56°
26
73°
55°
27
75°
54°
28
76°
54°
29
73°
56°
30
70°
54°
31
73°
56°
1
75°
56°
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 70° to 80°, with overnight lows between 52° and 57°. The average high for July is 75° 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.
