S
M
T
W
T
F
S
30
91°
53°
31
91°
53°
1
90°
52°
2
90°
54°
3
91°
53°
4
91°
52°
5
90°
48°
6
88°
45°
7
83°
45°
8
84°
47°
9
87°
50°
10
89°
52°
11
90°
50°
12
89°
49°
13
89°
49°
14
88°
50°
15
88°
48°
16
85°
44°
17
84°
49°
18
88°
50°
19
89°
50°
20
88°
47°
21
86°
49°
22
82°
51°
23
80°
47°
24
83°
49°
25
83°
45°
26
84°
44°
27
81°
43°
28
80°
42°
29
81°
42°
30
80°
45°
1
79°
52°
2
87°
50°
3
88°
49°
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 79° to 91°, with overnight lows between 42° and 54°. The average high for September is 86° with an average low of 49°. 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.