S
M
T
W
T
F
S
30
81°
43°
31
69°
49°
1
79°
59°
2
70°
51°
3
70°
53°
4
75°
48°
5
78°
42°
6
83°
50°
7
62°
49°
8
66°
49°
9
66°
50°
10
62°
43°
11
80°
52°
12
66°
51°
13
56°
36°
14
65°
34°
15
65°
48°
16
61°
45°
17
62°
34°
18
58°
27°
19
62°
36°
20
57°
32°
21
63°
29°
22
68°
31°
23
68°
30°
24
65°
52°
25
66°
50°
26
70°
47°
27
68°
47°
28
68°
50°
29
64°
48°
30
61°
44°
1
61°
39°
2
60°
37°
3
57°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Greenstone
Greenstone's September 2026 forecast shows daily high temperatures ranging from 57° to 70°, with overnight lows between 37° and 52°. The average high for September is 64° with an average low of 45°. 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 Greenstone. See also: October | November | December.
