S
M
T
W
T
F
S
26
86°
75°
27
88°
77°
28
88°
76°
29
87°
75°
30
89°
68°
1
68°
57°
2
76°
54°
3
79°
57°
4
82°
71°
5
85°
76°
6
85°
73°
7
76°
66°
8
80°
69°
9
85°
71°
10
85°
70°
11
83°
67°
12
84°
70°
13
87°
71°
14
85°
69°
15
84°
70°
16
85°
71°
17
86°
70°
18
81°
71°
19
82°
71°
20
83°
72°
21
85°
69°
22
84°
66°
23
82°
67°
24
82°
69°
25
83°
68°
26
83°
67°
27
84°
68°
28
83°
70°
29
82°
72°
30
83°
73°
31
82°
74°
1
85°
72°
2
86°
73°
3
86°
75°
4
87°
75°
5
84°
74°
6
83°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Houston
South Houston's May 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 66° and 76°. The average high for May is 84° with an average low of 71°. 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 South Houston. See also: June | July | August.
