S
M
T
W
T
F
S
30
85°
64°
31
86°
65°
1
84°
59°
2
87°
57°
3
83°
57°
4
82°
58°
5
84°
59°
6
86°
66°
7
89°
68°
8
91°
66°
9
86°
63°
10
87°
62°
11
86°
66°
12
89°
63°
13
91°
56°
14
82°
57°
15
83°
60°
16
87°
61°
17
88°
56°
18
87°
60°
19
85°
61°
20
87°
61°
21
88°
60°
22
87°
61°
23
86°
61°
24
86°
60°
25
85°
61°
26
81°
61°
27
84°
60°
28
85°
59°
29
85°
59°
30
84°
58°
1
84°
53°
2
83°
48°
3
81°
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 81° to 91°, with overnight lows between 48° and 68°. The average high for September is 86° with an average low of 60°. 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.