S
M
T
W
T
F
S
26
52°
30°
27
54°
31°
28
54°
34°
29
48°
34°
30
46°
31°
1
51°
41°
2
51°
37°
3
53°
30°
4
59°
39°
5
53°
40°
6
42°
34°
7
48°
33°
8
50°
33°
9
60°
33°
10
59°
41°
11
50°
37°
12
60°
33°
13
64°
39°
14
53°
40°
15
56°
38°
16
59°
44°
17
59°
46°
18
59°
43°
19
57°
42°
20
58°
41°
21
55°
39°
22
56°
42°
23
54°
39°
24
59°
43°
25
58°
42°
26
58°
41°
27
62°
42°
28
64°
44°
29
66°
40°
30
60°
39°
31
59°
39°
1
61°
43°
2
60°
41°
3
60°
41°
4
59°
42°
5
59°
41°
6
60°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Big Delta
Big Delta's May 2026 forecast shows daily high temperatures ranging from 53° to 66°, with overnight lows between 38° and 46°. The average high for May is 59° with an average low of 41°. 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 Big Delta. See also: June | July | August.