S
M
T
W
T
F
S
26
93°
70°
27
92°
68°
28
92°
75°
29
84°
67°
30
85°
67°
31
83°
63°
1
78°
69°
2
77°
68°
3
84°
66°
4
87°
65°
5
87°
63°
6
85°
66°
7
91°
70°
8
91°
72°
9
88°
67°
10
94°
73°
11
95°
74°
12
93°
72°
13
93°
73°
14
94°
76°
15
95°
74°
16
98°
75°
17
89°
67°
18
86°
64°
19
84°
66°
20
88°
70°
21
89°
66°
22
89°
64°
23
86°
59°
24
84°
55°
25
87°
59°
26
91°
63°
27
89°
64°
28
89°
61°
29
91°
59°
30
96°
62°
31
97°
70°
1
100°
69°
2
100°
69°
3
102°
70°
4
102°
71°
5
103°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mount Vernon
Mount Vernon's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Mount Vernon. See also: September | October | November.
