S
M
T
W
T
F
S
30
89°
59°
31
82°
60°
1
78°
54°
2
83°
56°
3
83°
59°
4
81°
62°
5
84°
60°
6
86°
59°
7
89°
58°
8
97°
63°
9
101°
72°
10
105°
72°
11
96°
62°
12
92°
65°
13
81°
60°
14
87°
56°
15
90°
54°
16
83°
57°
17
78°
52°
18
85°
56°
19
88°
58°
20
84°
60°
21
83°
57°
22
84°
56°
23
90°
58°
24
96°
57°
25
88°
63°
26
85°
57°
27
82°
58°
28
83°
53°
29
93°
58°
30
95°
61°
1
95°
63°
2
94°
63°
3
100°
65°
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 93° to 100°, with overnight lows between 58° and 65°. The average high for September is 95° with an average low of 62°. 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.
