S
M
T
W
T
F
S
26
86°
64°
27
88°
74°
28
87°
74°
29
79°
65°
30
70°
60°
1
60°
56°
2
76°
53°
3
80°
54°
4
82°
62°
5
83°
71°
6
80°
63°
7
73°
55°
8
76°
59°
9
80°
63°
10
79°
67°
11
76°
59°
12
80°
57°
13
83°
61°
14
86°
62°
15
85°
65°
16
84°
63°
17
79°
67°
18
80°
67°
19
81°
66°
20
82°
68°
21
85°
62°
22
81°
61°
23
81°
61°
24
82°
62°
25
79°
63°
26
81°
62°
27
81°
62°
28
82°
63°
29
83°
66°
30
85°
69°
31
84°
70°
1
84°
70°
2
85°
68°
3
86°
70°
4
87°
71°
5
86°
71°
6
85°
70°
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 73° to 87°, with overnight lows between 54° and 71°. The average high for May is 82° with an average low of 64°. 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.
