S
M
T
W
T
F
S
30
84°
60°
31
84°
63°
1
83°
64°
2
83°
62°
3
82°
54°
4
76°
53°
5
75°
55°
6
78°
62°
7
82°
62°
8
82°
60°
9
75°
56°
10
76°
61°
11
81°
60°
12
81°
61°
13
80°
61°
14
81°
60°
15
81°
59°
16
80°
59°
17
75°
53°
18
79°
51°
19
71°
49°
20
71°
48°
21
68°
47°
22
69°
55°
23
70°
50°
24
72°
48°
25
69°
54°
26
72°
56°
27
71°
54°
28
76°
55°
29
75°
53°
30
74°
52°
1
69°
53°
2
73°
53°
3
67°
47°
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 67° to 84°, with overnight lows between 47° and 64°. The average high for September is 76° 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 September weather will actually feel in Grafton. See also: October | November | December.
