S
M
T
W
T
F
S
26
82°
75°
27
85°
77°
28
85°
76°
29
84°
70°
30
85°
70°
1
72°
58°
2
75°
54°
3
78°
51°
4
80°
55°
5
83°
73°
6
84°
71°
7
74°
68°
8
76°
68°
9
89°
72°
10
87°
71°
11
81°
68°
12
83°
64°
13
86°
63°
14
85°
65°
15
83°
70°
16
85°
71°
17
83°
78°
18
86°
77°
19
85°
74°
20
86°
72°
21
81°
71°
22
80°
73°
23
79°
71°
24
81°
70°
25
82°
73°
26
83°
72°
27
82°
73°
28
84°
71°
29
86°
72°
30
84°
71°
31
85°
72°
1
85°
73°
2
87°
73°
3
86°
72°
4
85°
70°
5
85°
73°
6
86°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sweeny
Sweeny's May 2026 forecast shows daily high temperatures ranging from 79° to 87°, with overnight lows between 70° and 77°. The average high for May is 84° with an average low of 72°. 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 Sweeny. See also: June | July | August.
