S
M
T
W
T
F
S
27
94°
70°
28
88°
70°
29
93°
72°
30
91°
76°
1
79°
68°
2
77°
69°
3
73°
69°
4
77°
70°
5
84°
61°
6
86°
55°
7
88°
55°
8
88°
59°
9
88°
58°
10
87°
62°
11
88°
63°
12
88°
64°
13
82°
63°
14
81°
62°
15
80°
60°
16
76°
54°
17
69°
50°
18
72°
52°
19
69°
42°
20
70°
52°
21
71°
51°
22
72°
54°
23
75°
56°
24
78°
51°
25
70°
56°
26
79°
56°
27
74°
55°
28
77°
57°
29
76°
57°
30
77°
56°
31
77°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in McKinney
McKinney's October 2026 forecast shows daily high temperatures ranging from 69° to 88°, with overnight lows between 42° and 64°. The average high for October is 78° 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 October weather will actually feel in McKinney. See also: November | December | January.
