S
M
T
W
T
F
S
26
64°
48°
27
64°
46°
28
62°
49°
29
58°
42°
30
56°
34°
1
51°
33°
2
51°
29°
3
60°
38°
4
77°
49°
5
57°
45°
6
57°
41°
7
57°
35°
8
61°
42°
9
71°
48°
10
63°
40°
11
65°
38°
12
42°
36°
13
60°
38°
14
65°
37°
15
67°
38°
16
81°
56°
17
86°
61°
18
84°
65°
19
81°
62°
20
68°
51°
21
67°
48°
22
73°
49°
23
63°
55°
24
69°
51°
25
80°
46°
26
80°
52°
27
84°
58°
28
78°
49°
29
78°
53°
30
76°
47°
31
74°
51°
1
77°
50°
2
77°
53°
3
79°
57°
4
78°
59°
5
77°
58°
6
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Southwest
Southwest's May 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 47° and 59°. The average high for May is 78° with an average low of 54°. 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 Southwest. See also: June | July | August.
