S
M
T
W
T
F
S
26
85°
65°
27
88°
70°
28
85°
69°
29
86°
70°
30
82°
72°
31
89°
72°
1
90°
73°
2
91°
76°
3
83°
66°
4
84°
69°
5
82°
73°
6
89°
72°
7
91°
73°
8
88°
71°
9
88°
73°
10
90°
72°
11
89°
68°
12
87°
68°
13
85°
67°
14
84°
67°
15
87°
68°
16
86°
67°
17
89°
68°
18
88°
64°
19
87°
71°
20
88°
69°
21
87°
65°
22
86°
69°
23
89°
71°
24
90°
71°
25
89°
70°
26
85°
70°
27
81°
69°
28
83°
70°
29
86°
68°
30
86°
69°
31
86°
69°
1
85°
66°
2
79°
61°
3
78°
61°
4
78°
62°
5
79°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Wallingford
Wallingford's August 2026 forecast shows daily high temperatures ranging from 78° to 91°, with overnight lows between 60° and 73°. The average high for August is 86° with an average low of 68°. 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 Wallingford. See also: September | October | November.