S
M
T
W
T
F
S
26
81°
64°
27
83°
64°
28
78°
66°
29
74°
64°
30
78°
65°
31
85°
60°
1
85°
63°
2
79°
71°
3
77°
61°
4
82°
57°
5
87°
61°
6
87°
71°
7
79°
69°
8
84°
66°
9
81°
66°
10
82°
64°
11
81°
66°
12
80°
60°
13
81°
63°
14
81°
60°
15
77°
59°
16
84°
58°
17
80°
62°
18
78°
59°
19
79°
63°
20
74°
57°
21
77°
53°
22
82°
55°
23
73°
57°
24
65°
58°
25
71°
54°
26
79°
59°
27
79°
60°
28
75°
54°
29
72°
54°
30
73°
56°
31
74°
57°
1
73°
56°
2
72°
54°
3
72°
55°
4
71°
54°
5
70°
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 65° to 79°, with overnight lows between 53° and 60°. The average high for August is 73° with an average low of 56°. 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.
