S
M
T
W
T
F
S
30
79°
56°
31
77°
51°
1
72°
50°
2
70°
52°
3
70°
50°
4
71°
51°
5
69°
50°
6
69°
49°
7
70°
49°
8
71°
53°
9
70°
53°
10
67°
49°
11
68°
51°
12
71°
49°
13
69°
52°
14
71°
53°
15
66°
48°
16
66°
48°
17
63°
47°
18
65°
50°
19
70°
53°
20
Hist. Avg.
71°
47°
21
Hist. Avg.
70°
46°
22
Hist. Avg.
70°
46°
23
Hist. Avg.
69°
46°
24
Hist. Avg.
69°
45°
25
Hist. Avg.
69°
45°
26
Hist. Avg.
68°
45°
27
Hist. Avg.
68°
44°
28
Hist. Avg.
67°
44°
29
Hist. Avg.
67°
44°
30
Hist. Avg.
66°
43°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
66°
42°
3
Hist. Avg.
65°
42°
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 63° to 79°, with overnight lows between 47° and 56°. The average high for September is 70° 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.
