S
M
T
W
T
F
S
30
75°
50°
31
73°
54°
1
73°
54°
2
72°
51°
3
71°
55°
4
74°
60°
5
76°
54°
6
75°
49°
7
72°
50°
8
69°
49°
9
69°
53°
10
71°
54°
11
71°
52°
12
70°
47°
13
77°
55°
14
68°
44°
15
67°
45°
16
Hist. Avg.
68°
43°
17
Hist. Avg.
67°
43°
18
Hist. Avg.
67°
42°
19
Hist. Avg.
66°
42°
20
Hist. Avg.
66°
42°
21
Hist. Avg.
65°
41°
22
Hist. Avg.
65°
41°
23
Hist. Avg.
64°
40°
24
Hist. Avg.
64°
40°
25
Hist. Avg.
63°
40°
26
Hist. Avg.
63°
39°
27
Hist. Avg.
62°
39°
28
Hist. Avg.
62°
38°
29
Hist. Avg.
61°
38°
30
Hist. Avg.
61°
38°
1
Hist. Avg.
60°
37°
2
Hist. Avg.
60°
37°
3
Hist. Avg.
59°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Grafton
Grafton's September 2026 forecast shows daily high temperatures ranging from 67° to 77°, with overnight lows between 44° and 60°. The average high for September is 72° with an average low of 52°. 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.
