S
M
T
W
T
F
S
30
82°
64°
31
86°
72°
1
91°
73°
2
93°
73°
3
95°
73°
4
84°
72°
5
81°
66°
6
77°
61°
7
79°
61°
8
86°
66°
9
88°
70°
10
81°
68°
11
79°
59°
12
77°
68°
13
84°
57°
14
72°
50°
15
88°
59°
16
86°
70°
17
82°
70°
18
75°
64°
19
79°
63°
20
79°
63°
21
59°
55°
22
66°
57°
23
61°
57°
24
70°
50°
25
70°
46°
26
72°
46°
27
73°
45°
28
73°
45°
29
77°
48°
30
79°
57°
1
86°
64°
2
75°
48°
3
66°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in De Graff
De Graff's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 De Graff. See also: October | November | December.