S
M
T
W
T
F
S
30
68°
54°
31
69°
48°
1
68°
48°
2
67°
52°
3
67°
47°
4
72°
46°
5
67°
48°
6
68°
49°
7
70°
51°
8
71°
52°
9
71°
51°
10
69°
51°
11
69°
52°
12
68°
51°
13
70°
51°
14
70°
52°
15
69°
50°
16
69°
49°
17
67°
50°
18
68°
50°
19
69°
44°
20
65°
45°
21
64°
44°
22
65°
43°
23
63°
48°
24
66°
49°
25
65°
50°
26
67°
50°
27
67°
49°
28
66°
48°
29
62°
47°
30
61°
43°
1
60°
42°
2
60°
41°
3
61°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Greenhill
Greenhill's September 2026 forecast shows daily high temperatures ranging from 60° to 72°, with overnight lows between 41° and 54°. The average high for September is 67° with an average low of 48°. 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 Greenhill. See also: October | November | December.
