S
M
T
W
T
F
S
30
79°
61°
31
78°
61°
1
77°
62°
2
78°
63°
3
77°
66°
4
78°
62°
5
80°
62°
6
79°
61°
7
77°
60°
8
78°
59°
9
76°
60°
10
76°
63°
11
77°
59°
12
76°
59°
13
76°
58°
14
77°
62°
15
78°
64°
16
79°
62°
17
75°
57°
18
75°
57°
19
74°
58°
20
75°
62°
21
75°
57°
22
74°
59°
23
77°
60°
24
78°
61°
25
79°
62°
26
78°
53°
27
78°
54°
28
70°
53°
29
69°
52°
30
72°
53°
1
71°
52°
2
69°
50°
3
Hist. Avg.
72°
52°
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 69° to 80°, with overnight lows between 50° and 66°. The average high for September is 76° 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.