S
M
T
W
T
F
S
30
72°
52°
31
68°
48°
1
73°
42°
2
69°
53°
3
60°
54°
4
72°
58°
5
66°
53°
6
64°
51°
7
72°
54°
8
68°
47°
9
58°
54°
10
71°
49°
11
65°
45°
12
69°
50°
13
72°
52°
14
69°
50°
15
65°
52°
16
62°
46°
17
61°
46°
18
61°
49°
19
62°
45°
20
68°
49°
21
58°
47°
22
58°
49°
23
63°
48°
24
66°
48°
25
64°
47°
26
64°
45°
27
58°
41°
28
61°
42°
29
65°
46°
30
66°
47°
1
65°
47°
2
64°
46°
3
60°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Greenville
Greenville's September 2026 forecast shows daily high temperatures ranging from 58° to 72°, with overnight lows between 41° and 54°. The average high for September is 64° 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 Greenville. See also: October | November | December.
