S
M
T
W
T
F
S
26
87°
73°
27
88°
74°
28
87°
74°
29
86°
73°
30
87°
74°
31
87°
74°
1
88°
73°
2
89°
74°
3
91°
72°
4
88°
73°
5
89°
73°
6
87°
74°
7
89°
72°
8
90°
68°
9
89°
69°
10
91°
68°
11
91°
68°
12
90°
70°
13
90°
72°
14
89°
72°
15
91°
70°
16
90°
72°
17
89°
71°
18
87°
71°
19
91°
70°
20
86°
69°
21
86°
70°
22
87°
70°
23
86°
68°
24
86°
67°
25
87°
65°
26
86°
70°
27
89°
71°
28
90°
70°
29
90°
70°
30
89°
69°
31
90°
69°
1
90°
68°
2
83°
64°
3
84°
66°
4
84°
67°
5
86°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Deerfield
Deerfield's August 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 64° and 74°. The average high for August is 88° with an average low of 70°. 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 Deerfield. See also: September | October | November.