S
M
T
W
T
F
S
30
77°
57°
31
79°
58°
1
81°
56°
2
77°
55°
3
76°
60°
4
80°
63°
5
82°
62°
6
82°
56°
7
77°
58°
8
75°
55°
9
79°
61°
10
80°
59°
11
76°
61°
12
76°
60°
13
77°
55°
14
73°
52°
15
72°
52°
16
72°
51°
17
73°
57°
18
76°
58°
19
79°
59°
20
80°
58°
21
74°
51°
22
77°
56°
23
71°
55°
24
78°
49°
25
71°
48°
26
69°
54°
27
77°
55°
28
71°
55°
29
75°
56°
30
Hist. Avg.
72°
51°
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
*Temporarily Unavailable
September Weather in Grafton
Grafton's September 2026 forecast shows daily high temperatures ranging from 69° to 82°, with overnight lows between 48° and 63°. The average high for September is 76° with an average low of 56°. 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.
