S
M
T
W
T
F
S
26
101°
81°
27
100°
82°
28
100°
82°
29
98°
82°
30
100°
82°
31
101°
83°
1
99°
83°
2
97°
76°
3
101°
79°
4
99°
81°
5
100°
82°
6
100°
82°
7
100°
82°
8
100°
82°
9
99°
79°
10
98°
79°
11
99°
79°
12
101°
81°
13
101°
82°
14
100°
81°
15
101°
82°
16
103°
84°
17
104°
83°
18
103°
84°
19
104°
84°
20
104°
78°
21
101°
79°
22
99°
77°
23
101°
76°
24
98°
79°
25
101°
79°
26
101°
81°
27
100°
78°
28
92°
72°
29
94°
75°
30
95°
76°
31
96°
77°
1
95°
76°
2
95°
75°
3
87°
71°
4
86°
67°
5
86°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Plano
Plano's August 2026 forecast shows daily high temperatures ranging from 86° to 104°, with overnight lows between 67° and 84°. The average high for August is 98° with an average low of 77°. 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 Plano. See also: September | October | November.
