S
M
T
W
T
F
S
30
84°
65°
31
84°
65°
1
83°
60°
2
77°
57°
3
75°
57°
4
76°
56°
5
76°
56°
6
80°
61°
7
83°
63°
8
82°
62°
9
79°
62°
10
79°
63°
11
83°
62°
12
83°
63°
13
82°
64°
14
82°
53°
15
75°
53°
16
72°
54°
17
74°
53°
18
72°
51°
19
73°
52°
20
72°
52°
21
78°
54°
22
78°
58°
23
77°
50°
24
78°
49°
25
73°
49°
26
70°
51°
27
74°
56°
28
74°
56°
29
76°
47°
30
72°
48°
1
68°
53°
2
69°
53°
3
72°
52°
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 68° to 84°, with overnight lows between 47° and 65°. The average high for September is 77° with an average low of 56°. 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.
