S
M
T
W
T
F
S
26
89°
73°
27
90°
73°
28
91°
72°
29
91°
73°
30
90°
72°
31
89°
72°
1
89°
71°
2
88°
72°
3
90°
72°
4
90°
71°
5
89°
72°
6
89°
72°
7
85°
64°
8
87°
68°
9
87°
63°
10
83°
62°
11
82°
62°
12
83°
65°
13
84°
68°
14
84°
66°
15
85°
68°
16
85°
66°
17
82°
66°
18
85°
65°
19
82°
64°
20
80°
63°
21
81°
61°
22
82°
61°
23
85°
66°
24
88°
66°
25
88°
65°
26
87°
66°
27
87°
62°
28
86°
63°
29
82°
63°
30
81°
64°
31
80°
59°
1
79°
58°
2
79°
58°
3
78°
57°
4
78°
56°
5
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mount Vernon Township
Mount Vernon Township's August 2026 forecast shows daily high temperatures ranging from 78° to 91°, with overnight lows between 56° and 73°. The average high for August is 85° with an average low of 66°. 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 Township. See also: September | October | November.