S
M
T
W
T
F
S
26
51°
41°
27
53°
41°
28
57°
39°
29
47°
32°
30
43°
26°
1
50°
22°
2
61°
22°
3
68°
46°
4
60°
41°
5
47°
33°
6
43°
29°
7
51°
28°
8
61°
39°
9
56°
30°
10
53°
27°
11
56°
34°
12
54°
38°
13
61°
40°
14
64°
43°
15
66°
43°
16
64°
41°
17
64°
40°
18
65°
43°
19
67°
41°
20
60°
37°
21
61°
38°
22
61°
39°
23
62°
40°
24
62°
42°
25
63°
45°
26
68°
44°
27
71°
47°
28
72°
48°
29
73°
49°
30
71°
50°
31
73°
49°
1
68°
47°
2
72°
51°
3
74°
52°
4
75°
50°
5
65°
47°
6
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Delta
Delta's May 2026 forecast shows daily high temperatures ranging from 43° to 75°, with overnight lows between 27° and 52°. The average high for May is 64° with an average low of 42°. 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 Delta. See also: June | July | August.