S
M
T
W
T
F
S
30
89°
62°
31
90°
66°
1
90°
66°
2
89°
65°
3
90°
65°
4
90°
66°
5
89°
65°
6
88°
64°
7
88°
61°
8
80°
62°
9
81°
63°
10
80°
64°
11
87°
63°
12
86°
64°
13
87°
63°
14
87°
61°
15
85°
61°
16
77°
54°
17
77°
53°
18
78°
57°
19
82°
52°
20
76°
52°
21
75°
53°
22
75°
53°
23
77°
58°
24
82°
59°
25
82°
60°
26
83°
59°
27
82°
58°
28
80°
54°
29
79°
55°
30
80°
53°
1
78°
52°
2
80°
56°
3
72°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Greenfield
Greenfield's September 2026 forecast shows daily high temperatures ranging from 72° to 90°, with overnight lows between 47° and 66°. The average high for September is 83° with an average low of 59°. 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 Greenfield. See also: October | November | December.