S
M
T
W
T
F
S
26
97°
77°
27
97°
75°
28
98°
76°
29
98°
76°
30
98°
77°
31
103°
80°
1
96°
77°
2
95°
67°
3
100°
73°
4
101°
79°
5
100°
78°
6
100°
78°
7
98°
77°
8
100°
78°
9
99°
77°
10
101°
76°
11
102°
78°
12
101°
78°
13
100°
76°
14
106°
78°
15
98°
75°
16
96°
74°
17
98°
75°
18
97°
74°
19
97°
76°
20
96°
76°
21
98°
75°
22
97°
75°
23
97°
74°
24
96°
75°
25
97°
75°
26
97°
74°
27
96°
75°
28
97°
74°
29
96°
75°
30
97°
76°
31
97°
74°
1
95°
73°
2
94°
74°
3
95°
74°
4
95°
73°
5
94°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in McKinney
McKinney's August 2026 forecast shows daily high temperatures ranging from 94° to 106°, with overnight lows between 67° and 79°. The average high for August is 98° with an average low of 75°. 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 McKinney. See also: September | October | November.
