S
M
T
W
T
F
S
26
83°
65°
27
80°
61°
28
78°
60°
29
81°
66°
30
80°
60°
31
80°
60°
1
81°
59°
2
79°
59°
3
79°
60°
4
80°
58°
5
79°
59°
6
79°
60°
7
80°
61°
8
79°
63°
9
80°
66°
10
81°
64°
11
80°
64°
12
81°
65°
13
83°
60°
14
86°
58°
15
78°
58°
16
79°
59°
17
80°
60°
18
81°
59°
19
78°
58°
20
78°
56°
21
79°
58°
22
78°
60°
23
77°
57°
24
78°
57°
25
77°
63°
26
82°
64°
27
84°
64°
28
85°
63°
29
86°
56°
30
84°
56°
31
77°
59°
1
78°
60°
2
77°
62°
3
82°
55°
4
77°
58°
5
77°
61°
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 77° to 86°, with overnight lows between 55° and 66°. The average high for August is 80° with an average low of 60°. 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.