S
M
T
W
T
F
S
26
88°
72°
27
88°
70°
28
86°
74°
29
84°
71°
30
87°
73°
1
87°
72°
2
94°
76°
3
82°
72°
4
82°
71°
5
88°
74°
6
88°
75°
7
91°
74°
8
93°
72°
9
91°
75°
10
91°
79°
11
90°
80°
12
91°
77°
13
94°
77°
14
95°
74°
15
93°
72°
16
90°
74°
17
87°
73°
18
87°
75°
19
87°
75°
20
88°
73°
21
89°
78°
22
89°
79°
23
89°
77°
24
89°
78°
25
88°
77°
26
88°
80°
27
88°
79°
28
87°
77°
29
88°
78°
30
88°
76°
31
87°
75°
1
85°
76°
2
85°
77°
3
83°
76°
4
86°
77°
5
87°
76°
6
85°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Brownsville
Brownsville's May 2026 forecast shows daily high temperatures ranging from 83° to 88°, with overnight lows between 75° and 79°. The average high for May is 86° with an average low of 77°. 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 Brownsville. See also: June | July | August.
