S
M
T
W
T
F
S
30
74°
52°
31
71°
49°
1
71°
48°
2
70°
49°
3
71°
55°
4
70°
51°
5
71°
48°
6
70°
47°
7
69°
49°
8
70°
52°
9
72°
53°
10
73°
54°
11
73°
52°
12
66°
50°
13
Hist. Avg.
73°
49°
14
Hist. Avg.
73°
48°
15
Hist. Avg.
72°
48°
16
Hist. Avg.
72°
48°
17
Hist. Avg.
71°
47°
18
Hist. Avg.
71°
47°
19
Hist. Avg.
71°
47°
20
Hist. Avg.
70°
46°
21
Hist. Avg.
70°
46°
22
Hist. Avg.
69°
46°
23
Hist. Avg.
69°
45°
24
Hist. Avg.
68°
45°
25
Hist. Avg.
68°
44°
26
Hist. Avg.
67°
44°
27
Hist. Avg.
67°
44°
28
Hist. Avg.
66°
43°
29
Hist. Avg.
66°
43°
30
Hist. Avg.
66°
42°
1
Hist. Avg.
65°
42°
2
Hist. Avg.
65°
42°
3
Hist. Avg.
64°
41°
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 66° to 74°, with overnight lows between 47° and 55°. The average high for September is 71° with an average low of 51°. 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.
