S
M
T
W
T
F
S
26
83°
53°
27
85°
61°
28
83°
62°
29
72°
55°
30
67°
46°
1
67°
43°
2
63°
40°
3
69°
53°
4
78°
58°
5
75°
58°
6
67°
45°
7
61°
44°
8
66°
52°
9
72°
53°
10
74°
55°
11
75°
58°
12
76°
56°
13
75°
54°
14
78°
55°
15
76°
60°
16
79°
60°
17
79°
61°
18
80°
61°
19
78°
60°
20
81°
62°
21
81°
62°
22
80°
61°
23
77°
62°
24
76°
62°
25
80°
63°
26
80°
63°
27
77°
59°
28
76°
60°
29
79°
59°
30
77°
58°
31
80°
63°
1
81°
64°
2
84°
64°
3
84°
63°
4
82°
61°
5
78°
60°
6
78°
58°
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 61° to 84°, with overnight lows between 40° and 64°. The average high for May is 76° with an average low of 58°. 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.
