S
M
T
W
T
F
S
26
79°
58°
27
80°
59°
28
81°
61°
29
81°
64°
30
82°
60°
31
85°
63°
1
87°
65°
2
88°
65°
3
88°
66°
4
87°
61°
5
83°
58°
6
80°
58°
7
79°
59°
8
80°
59°
9
80°
60°
10
82°
58°
11
83°
60°
12
85°
59°
13
86°
63°
14
85°
64°
15
86°
64°
16
86°
63°
17
83°
63°
18
80°
58°
19
79°
57°
20
80°
60°
21
79°
63°
22
80°
61°
23
78°
57°
24
79°
62°
25
79°
62°
26
85°
56°
27
79°
62°
28
79°
63°
29
85°
62°
30
84°
63°
31
83°
60°
1
82°
59°
2
83°
60°
3
82°
58°
4
83°
60°
5
82°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Derby
Derby's August 2026 forecast shows daily high temperatures ranging from 78° to 88°, with overnight lows between 56° and 66°. The average high for August is 82° 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 Derby. See also: September | October | November.