S
M
T
W
T
F
S
26
56°
41°
27
53°
39°
28
59°
35°
29
64°
41°
30
64°
41°
1
71°
37°
2
77°
44°
3
79°
56°
4
75°
52°
5
71°
48°
6
75°
45°
7
83°
48°
8
89°
54°
9
84°
49°
10
80°
49°
11
83°
48°
12
85°
52°
13
88°
52°
14
75°
40°
15
68°
39°
16
67°
38°
17
69°
42°
18
71°
44°
19
68°
41°
20
68°
38°
21
69°
40°
22
71°
41°
23
71°
38°
24
70°
38°
25
70°
39°
26
71°
38°
27
73°
40°
28
80°
49°
29
83°
49°
30
84°
51°
31
82°
50°
1
82°
50°
2
81°
49°
3
83°
51°
4
86°
52°
5
86°
53°
6
85°
52°
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 67° to 89°, with overnight lows between 37° and 56°. The average high for May is 77° with an average low of 46°. 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.