S
M
T
W
T
F
S
26
80°
51°
27
85°
55°
28
80°
61°
29
70°
56°
30
64°
46°
1
64°
43°
2
62°
40°
3
67°
37°
4
82°
51°
5
77°
59°
6
64°
50°
7
65°
45°
8
73°
40°
9
77°
57°
10
78°
53°
11
74°
52°
12
77°
47°
13
78°
57°
14
68°
48°
15
79°
42°
16
85°
66°
17
90°
64°
18
91°
67°
19
92°
72°
20
76°
68°
21
68°
61°
22
76°
66°
23
77°
63°
24
80°
66°
25
77°
68°
26
77°
68°
27
78°
67°
28
81°
66°
29
77°
60°
30
74°
58°
31
72°
58°
1
79°
65°
2
78°
64°
3
79°
66°
4
81°
61°
5
78°
66°
6
80°
66°
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 72° to 81°, with overnight lows between 58° and 68°. The average high for May is 78° 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.
