S
M
T
W
T
F
S
26
100°
80°
27
101°
76°
28
96°
81°
29
100°
81°
30
101°
80°
31
101°
82°
1
100°
76°
2
102°
79°
3
99°
76°
4
96°
75°
5
94°
75°
6
95°
78°
7
96°
79°
8
97°
76°
9
98°
77°
10
99°
80°
11
96°
79°
12
99°
76°
13
95°
74°
14
94°
72°
15
93°
72°
16
93°
73°
17
94°
73°
18
94°
74°
19
95°
74°
20
95°
73°
21
97°
73°
22
98°
74°
23
98°
77°
24
97°
78°
25
99°
78°
26
97°
79°
27
98°
78°
28
97°
77°
29
96°
78°
30
96°
77°
31
97°
71°
1
91°
70°
2
91°
71°
3
Hist. Avg.
94°
74°
4
Hist. Avg.
93°
74°
5
Hist. Avg.
93°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Dallas
Dallas's August 2026 forecast shows daily high temperatures ranging from 91° to 102°, with overnight lows between 70° and 82°. The average high for August is 97° with an average low of 76°. 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 Dallas. See also: September | October | November.
