S
M
T
W
T
F
S
26
59°
45°
27
72°
43°
28
63°
48°
29
54°
45°
30
55°
41°
1
50°
37°
2
50°
32°
3
63°
36°
4
77°
46°
5
59°
45°
6
55°
41°
7
55°
42°
8
63°
46°
9
69°
46°
10
57°
39°
11
56°
36°
12
58°
45°
13
61°
43°
14
65°
46°
15
69°
47°
16
64°
47°
17
63°
47°
18
68°
48°
19
69°
49°
20
65°
44°
21
66°
45°
22
65°
45°
23
66°
48°
24
67°
50°
25
68°
49°
26
70°
50°
27
71°
47°
28
73°
53°
29
76°
56°
30
78°
57°
31
78°
57°
1
77°
56°
2
73°
55°
3
79°
58°
4
80°
60°
5
81°
60°
6
80°
59°
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 55° to 81°, with overnight lows between 36° and 60°. The average high for May is 68° with an average low of 49°. 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.