S
M
T
W
T
F
S
30
76°
59°
31
79°
58°
1
81°
58°
2
80°
53°
3
74°
54°
4
73°
57°
5
74°
56°
6
79°
49°
7
73°
48°
8
68°
47°
9
69°
54°
10
70°
55°
11
73°
54°
12
76°
54°
13
78°
45°
14
72°
45°
15
66°
46°
16
66°
49°
17
65°
44°
18
66°
43°
19
69°
40°
20
65°
42°
21
65°
50°
22
66°
45°
23
73°
50°
24
72°
51°
25
73°
51°
26
72°
50°
27
73°
49°
28
71°
45°
29
68°
44°
30
63°
46°
1
67°
44°
2
71°
48°
3
61°
37°
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 61° to 81°, with overnight lows between 37° and 59°. The average high for September is 71° with an average low of 49°. 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.
