S
M
T
W
T
F
S
30
89°
68°
31
88°
67°
1
89°
68°
2
89°
65°
3
86°
64°
4
86°
65°
5
86°
67°
6
90°
68°
7
92°
68°
8
90°
67°
9
85°
70°
10
88°
70°
11
92°
71°
12
92°
70°
13
91°
71°
14
91°
70°
15
92°
70°
16
90°
69°
17
91°
65°
18
90°
67°
19
85°
69°
20
88°
67°
21
89°
59°
22
82°
58°
23
85°
65°
24
86°
58°
25
82°
57°
26
Hist. Avg.
82°
63°
27
Hist. Avg.
82°
62°
28
Hist. Avg.
82°
62°
29
Hist. Avg.
81°
62°
30
Hist. Avg.
81°
61°
1
Hist. Avg.
81°
61°
2
Hist. Avg.
80°
60°
3
Hist. Avg.
80°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Southwest Grayson
Southwest Grayson's September 2026 forecast shows daily high temperatures ranging from 82° to 92°, with overnight lows between 57° and 71°. The average high for September is 88° with an average low of 66°. 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 Southwest Grayson. See also: October | November | December.
