S
M
T
W
T
F
S
26
57°
25°
27
54°
36°
28
46°
28°
29
43°
28°
30
46°
28°
1
57°
21°
2
66°
34°
3
73°
32°
4
46°
34°
5
39°
28°
6
48°
25°
7
57°
27°
8
63°
28°
9
55°
30°
10
54°
27°
11
70°
30°
12
66°
43°
13
77°
36°
14
81°
55°
15
75°
48°
16
54°
37°
17
54°
36°
18
48°
37°
19
48°
31°
20
64°
45°
21
66°
47°
22
62°
45°
23
69°
48°
24
72°
48°
25
76°
54°
26
75°
52°
27
74°
54°
28
74°
52°
29
73°
52°
30
75°
54°
31
68°
46°
1
70°
52°
2
65°
51°
3
70°
50°
4
73°
53°
5
70°
53°
6
66°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sundown
Sundown's May 2026 forecast shows daily high temperatures ranging from 48° to 76°, with overnight lows between 31° and 54°. 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 Sundown. See also: June | July | August.