S
M
T
W
T
F
S
26
87°
68°
27
86°
68°
28
87°
67°
29
86°
67°
30
85°
65°
31
81°
61°
1
78°
66°
2
78°
66°
3
79°
64°
4
84°
67°
5
85°
67°
6
84°
66°
7
79°
62°
8
77°
63°
9
78°
64°
10
80°
65°
11
82°
66°
12
84°
66°
13
85°
67°
14
86°
66°
15
85°
67°
16
87°
60°
17
85°
58°
18
78°
56°
19
76°
55°
20
76°
55°
21
77°
56°
22
77°
56°
23
78°
57°
24
77°
58°
25
80°
62°
26
82°
57°
27
80°
56°
28
76°
55°
29
78°
60°
30
81°
63°
31
81°
55°
1
80°
53°
2
76°
54°
3
75°
59°
4
77°
63°
5
82°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in DeKalb
DeKalb's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 53° and 68°. The average high for August is 81° with an average low of 61°. 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 DeKalb. See also: September | October | November.
