S
M
T
W
T
F
S
26
63°
46°
27
78°
47°
28
74°
55°
29
63°
48°
30
58°
40°
1
53°
35°
2
51°
33°
3
62°
31°
4
74°
46°
5
70°
50°
6
59°
40°
7
59°
38°
8
69°
41°
9
72°
53°
10
66°
50°
11
68°
40°
12
72°
44°
13
66°
47°
14
63°
45°
15
69°
37°
16
77°
53°
17
85°
59°
18
89°
64°
19
89°
66°
20
67°
50°
21
68°
50°
22
62°
53°
23
76°
62°
24
72°
59°
25
78°
61°
26
79°
57°
27
74°
64°
28
78°
55°
29
78°
48°
30
75°
47°
31
76°
53°
1
75°
52°
2
77°
53°
3
76°
53°
4
78°
59°
5
81°
62°
6
78°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Derby
Derby's May 2026 forecast shows daily high temperatures ranging from 75° to 81°, with overnight lows between 47° and 62°. The average high for May is 77° 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 May weather will actually feel in Derby. See also: June | July | August.