S
M
T
W
T
F
S
26
82°
59°
27
77°
61°
28
68°
57°
29
83°
62°
30
73°
58°
1
68°
55°
2
70°
50°
3
71°
44°
4
78°
42°
5
80°
47°
6
82°
63°
7
72°
56°
8
72°
49°
9
71°
55°
10
82°
55°
11
80°
57°
12
73°
56°
13
80°
53°
14
74°
50°
15
78°
43°
16
85°
50°
17
89°
60°
18
88°
61°
19
88°
62°
20
89°
63°
21
85°
68°
22
85°
68°
23
84°
69°
24
83°
68°
25
76°
68°
26
80°
70°
27
82°
67°
28
87°
71°
29
85°
67°
30
79°
62°
31
76°
63°
1
78°
64°
2
79°
61°
3
79°
64°
4
81°
65°
5
83°
65°
6
82°
64°
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 76° to 87°, with overnight lows between 61° and 71°. The average high for May is 81° with an average low of 66°. 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.
