S
M
T
W
T
F
S
30
86°
69°
31
90°
70°
1
95°
75°
2
93°
72°
3
94°
73°
4
97°
74°
5
93°
70°
6
81°
60°
7
82°
58°
8
87°
60°
9
88°
71°
10
80°
67°
11
82°
58°
12
82°
69°
13
86°
60°
14
76°
51°
15
92°
61°
16
92°
71°
17
90°
69°
18
77°
62°
19
83°
68°
20
81°
61°
21
76°
57°
22
70°
56°
23
68°
55°
24
70°
53°
25
69°
52°
26
70°
48°
27
75°
52°
28
73°
51°
29
73°
52°
30
77°
51°
1
78°
49°
2
72°
54°
3
68°
55°
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 68° to 83°, with overnight lows between 48° and 68°. The average high for September is 74° with an average low of 55°. 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.