S
M
T
W
T
F
S
26
87°
68°
27
86°
68°
28
84°
67°
29
83°
66°
30
83°
66°
31
77°
63°
1
79°
64°
2
82°
66°
3
82°
63°
4
79°
61°
5
81°
64°
6
83°
66°
7
82°
66°
8
76°
65°
9
78°
62°
10
79°
62°
11
81°
64°
12
82°
66°
13
82°
66°
14
81°
65°
15
75°
62°
16
76°
61°
17
79°
64°
18
82°
65°
19
83°
65°
20
83°
64°
21
72°
54°
22
73°
56°
23
74°
54°
24
73°
60°
25
74°
55°
26
73°
57°
27
72°
61°
28
73°
59°
29
78°
54°
30
73°
56°
31
76°
61°
1
72°
57°
2
78°
61°
3
79°
61°
4
82°
57°
5
77°
53°
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 72° to 87°, with overnight lows between 53° and 68°. The average high for August is 79° with an average low of 62°. 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.
