S
M
T
W
T
F
S
30
80°
56°
31
78°
57°
1
78°
53°
2
77°
56°
3
79°
60°
4
86°
61°
5
85°
61°
6
86°
57°
7
83°
58°
8
76°
56°
9
79°
52°
10
76°
53°
11
76°
58°
12
79°
56°
13
75°
58°
14
75°
60°
15
82°
58°
16
82°
47°
17
74°
46°
18
72°
45°
19
70°
48°
20
72°
48°
21
72°
54°
22
79°
57°
23
78°
55°
24
79°
46°
25
72°
44°
26
70°
45°
27
68°
44°
28
69°
43°
29
69°
44°
30
68°
53°
1
79°
43°
2
Hist. Avg.
75°
44°
3
Hist. Avg.
74°
44°
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 68° to 86°, with overnight lows between 43° and 61°. The average high for September is 76° 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.
