S
M
T
W
T
F
S
26
83°
64°
27
79°
62°
28
78°
60°
29
79°
64°
30
84°
66°
31
86°
65°
1
80°
61°
2
83°
65°
3
85°
58°
4
79°
61°
5
79°
63°
6
80°
58°
7
79°
57°
8
80°
56°
9
79°
56°
10
79°
63°
11
81°
61°
12
80°
59°
13
83°
55°
14
78°
55°
15
79°
57°
16
79°
56°
17
76°
55°
18
77°
54°
19
78°
54°
20
80°
59°
21
81°
62°
22
81°
62°
23
84°
63°
24
84°
63°
25
85°
59°
26
82°
54°
27
78°
58°
28
81°
61°
29
82°
53°
30
77°
51°
31
76°
50°
1
74°
54°
2
73°
52°
3
75°
52°
4
74°
51°
5
73°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Delavan
Delavan's August 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 50° and 66°. The average high for August is 80° with an average low of 58°. 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 Delavan. See also: September | October | November.