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
100°
72°
8
99°
77°
9
100°
70°
10
83°
66°
11
91°
69°
12
91°
68°
13
95°
69°
14
93°
62°
15
81°
58°
16
78°
60°
17
85°
61°
18
81°
61°
19
82°
55°
20
80°
56°
21
85°
62°
22
84°
62°
23
85°
61°
24
85°
62°
25
84°
62°
26
82°
61°
27
82°
61°
28
83°
60°
29
82°
61°
30
78°
55°
1
74°
50°
2
68°
46°
3
67°
46°
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 67° to 100°, with overnight lows between 46° and 77°. The average high for September is 84° with an average low of 61°. 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.