S
M
T
W
T
F
S
26
85°
71°
27
88°
75°
28
87°
73°
29
85°
72°
30
75°
64°
1
64°
53°
2
75°
50°
3
79°
48°
4
80°
50°
5
83°
66°
6
83°
67°
7
78°
58°
8
75°
64°
9
87°
69°
10
89°
68°
11
77°
65°
12
77°
62°
13
93°
61°
14
90°
65°
15
87°
66°
16
87°
69°
17
83°
76°
18
87°
76°
19
84°
64°
20
79°
64°
21
80°
69°
22
88°
68°
23
84°
67°
24
87°
65°
25
90°
67°
26
89°
72°
27
76°
68°
28
89°
69°
29
90°
70°
30
88°
70°
31
85°
69°
1
86°
66°
2
85°
65°
3
86°
68°
4
85°
63°
5
86°
67°
6
86°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sam Houston
Sam Houston's May 2026 forecast shows daily high temperatures ranging from 76° to 90°, with overnight lows between 63° and 72°. The average high for May is 86° with an average low of 68°. 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 Sam Houston. See also: June | July | August.
