S
M
T
W
T
F
S
30
92°
66°
31
89°
65°
1
82°
63°
2
84°
59°
3
80°
58°
4
81°
62°
5
83°
65°
6
88°
64°
7
89°
63°
8
82°
62°
9
86°
63°
10
87°
56°
11
79°
55°
12
79°
55°
13
80°
56°
14
80°
61°
15
85°
62°
16
82°
61°
17
84°
60°
18
77°
52°
19
76°
51°
20
75°
55°
21
75°
56°
22
78°
58°
23
81°
59°
24
82°
60°
25
83°
51°
26
82°
49°
27
74°
50°
28
72°
49°
29
72°
48°
30
73°
56°
1
77°
57°
2
Hist. Avg.
75°
51°
3
Hist. Avg.
75°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grafton
Grafton's September 2026 forecast shows daily high temperatures ranging from 72° to 92°, with overnight lows between 48° and 66°. The average high for September is 81° with an average low of 58°. 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 Grafton. See also: October | November | December.
