S
M
T
W
T
F
S
26
78°
59°
27
83°
63°
28
83°
68°
29
79°
61°
30
84°
54°
31
85°
59°
1
78°
67°
2
80°
68°
3
81°
63°
4
86°
54°
5
87°
68°
6
87°
66°
7
85°
69°
8
87°
66°
9
86°
64°
10
84°
67°
11
75°
67°
12
81°
67°
13
81°
68°
14
82°
67°
15
84°
69°
16
90°
69°
17
80°
58°
18
81°
59°
19
83°
62°
20
82°
59°
21
83°
61°
22
82°
62°
23
80°
60°
24
78°
59°
25
76°
55°
26
79°
58°
27
83°
61°
28
75°
53°
29
76°
54°
30
79°
58°
31
82°
60°
1
84°
61°
2
84°
60°
3
83°
59°
4
83°
59°
5
81°
58°
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 75° to 90°, with overnight lows between 53° and 69°. The average high for August is 81° with an average low of 61°. 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.
