S
M
T
W
T
F
S
30
95°
64°
31
95°
63°
1
96°
64°
2
95°
64°
3
92°
63°
4
93°
62°
5
92°
63°
6
93°
64°
7
91°
64°
8
90°
63°
9
90°
63°
10
91°
62°
11
92°
63°
12
91°
61°
13
93°
60°
14
91°
60°
15
91°
61°
16
90°
62°
17
89°
62°
18
86°
60°
19
92°
62°
20
93°
61°
21
86°
55°
22
85°
56°
23
87°
57°
24
89°
58°
25
89°
58°
26
91°
56°
27
90°
53°
28
84°
52°
29
82°
53°
30
83°
55°
1
86°
54°
2
89°
58°
3
88°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grayson
Grayson's September 2026 forecast shows daily high temperatures ranging from 82° to 96°, with overnight lows between 52° and 64°. The average high for September is 90° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Grayson. See also: October | November | December.
