S
M
T
W
T
F
S
26
81°
67°
27
83°
68°
28
87°
68°
29
87°
67°
30
88°
69°
31
87°
69°
1
85°
68°
2
87°
69°
3
88°
69°
4
89°
68°
5
86°
68°
6
87°
67°
7
88°
67°
8
82°
61°
9
80°
61°
10
80°
62°
11
83°
68°
12
81°
67°
13
85°
68°
14
87°
68°
15
86°
66°
16
82°
64°
17
81°
60°
18
82°
58°
19
84°
66°
20
86°
65°
21
87°
66°
22
88°
65°
23
87°
65°
24
81°
63°
25
81°
64°
26
80°
60°
27
80°
62°
28
81°
62°
29
80°
61°
30
84°
60°
31
86°
64°
1
86°
65°
2
84°
64°
3
86°
56°
4
79°
55°
5
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Westerville
Westerville's August 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 55° and 69°. The average high for August is 84° with an average low of 64°. 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 Westerville. See also: September | October | November.
