S
M
T
W
T
F
S
26
99°
78°
27
98°
78°
28
98°
81°
29
98°
81°
30
98°
81°
31
98°
81°
1
99°
82°
2
102°
78°
3
98°
77°
4
98°
81°
5
97°
81°
6
97°
79°
7
96°
78°
8
96°
79°
9
96°
78°
10
97°
80°
11
98°
81°
12
97°
79°
13
98°
80°
14
99°
79°
15
97°
79°
16
98°
80°
17
94°
79°
18
93°
80°
19
94°
79°
20
95°
79°
21
94°
80°
22
95°
80°
23
95°
79°
24
94°
80°
25
96°
80°
26
96°
79°
27
95°
79°
28
94°
78°
29
95°
78°
30
96°
79°
31
96°
79°
1
95°
78°
2
94°
79°
3
93°
79°
4
95°
78°
5
95°
78°
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 93° to 99°, with overnight lows between 78° and 81°. The average high for August is 96° with an average low of 79°. 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.
