S
M
T
W
T
F
S
30
99°
71°
31
100°
73°
1
98°
75°
2
99°
77°
3
99°
76°
4
99°
74°
5
101°
75°
6
101°
73°
7
97°
76°
8
100°
74°
9
101°
75°
10
82°
70°
11
90°
67°
12
86°
70°
13
90°
74°
14
98°
75°
15
98°
73°
16
97°
73°
17
94°
68°
18
93°
65°
19
86°
61°
20
77°
57°
21
76°
57°
22
80°
56°
23
82°
57°
24
84°
58°
25
78°
54°
26
83°
61°
27
83°
61°
28
81°
60°
29
80°
61°
30
80°
60°
1
79°
60°
2
81°
59°
3
81°
57°
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 76° to 98°, with overnight lows between 54° and 75°. The average high for September is 85° with an average low of 63°. 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.