S
M
T
W
T
F
S
26
98°
76°
27
100°
78°
28
99°
77°
29
101°
78°
30
100°
79°
31
101°
78°
1
100°
77°
2
89°
68°
3
94°
69°
4
97°
72°
5
100°
74°
6
98°
73°
7
97°
75°
8
98°
73°
9
96°
74°
10
95°
73°
11
95°
74°
12
97°
75°
13
97°
74°
14
98°
75°
15
94°
72°
16
90°
69°
17
96°
75°
18
96°
75°
19
95°
74°
20
97°
75°
21
96°
75°
22
96°
74°
23
95°
74°
24
95°
75°
25
96°
75°
26
96°
74°
27
95°
75°
28
96°
75°
29
96°
73°
30
95°
74°
31
94°
74°
1
93°
73°
2
95°
74°
3
95°
74°
4
94°
73°
5
94°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Brownsville
Brownsville's August 2026 forecast shows daily high temperatures ranging from 89° to 100°, with overnight lows between 68° and 75°. The average high for August is 95° with an average low of 74°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Brownsville. See also: September | October | November.
