S
M
T
W
T
F
S
30
76°
58°
31
76°
56°
1
76°
57°
2
77°
58°
3
78°
57°
4
79°
56°
5
78°
55°
6
77°
56°
7
75°
53°
8
76°
54°
9
74°
60°
10
75°
54°
11
74°
53°
12
74°
53°
13
75°
59°
14
77°
55°
15
79°
57°
16
80°
59°
17
81°
60°
18
81°
59°
19
80°
50°
20
78°
50°
21
70°
55°
22
71°
56°
23
74°
57°
24
76°
58°
25
77°
49°
26
75°
46°
27
72°
49°
28
67°
48°
29
67°
48°
30
65°
46°
1
Hist. Avg.
71°
51°
2
Hist. Avg.
71°
50°
3
Hist. Avg.
70°
50°
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 65° to 81°, with overnight lows between 46° and 60°. The average high for September is 75° with an average low of 54°. 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.
