S
M
T
W
T
F
S
26
70°
59°
27
75°
57°
28
81°
64°
29
84°
63°
30
73°
59°
31
N/A
1
74°
49°
2
78°
57°
3
80°
60°
4
80°
60°
5
75°
56°
6
71°
55°
7
70°
54°
8
71°
55°
9
73°
57°
10
75°
59°
11
74°
56°
12
75°
57°
13
72°
55°
14
72°
57°
15
73°
57°
16
73°
56°
17
72°
57°
18
71°
56°
19
71°
57°
20
70°
56°
21
70°
55°
22
68°
53°
23
67°
55°
24
67°
55°
25
68°
54°
26
69°
56°
27
70°
55°
28
69°
53°
29
67°
55°
30
66°
54°
31
66°
50°
1
63°
49°
2
64°
51°
3
63°
50°
4
63°
48°
5
64°
48°
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 63° to 80°, with overnight lows between 48° and 60°. The average high for August is 70° with an average low of 55°. 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.