S
M
T
W
T
F
S
30
98°
65°
31
99°
71°
1
100°
72°
2
100°
73°
3
99°
73°
4
99°
73°
5
102°
72°
6
103°
75°
7
102°
72°
8
100°
72°
9
98°
72°
10
98°
73°
11
95°
75°
12
98°
73°
13
101°
75°
14
99°
73°
15
100°
74°
16
100°
69°
17
99°
70°
18
99°
68°
19
100°
70°
20
98°
75°
21
97°
70°
22
94°
66°
23
90°
63°
24
88°
65°
25
89°
66°
26
91°
62°
27
90°
64°
28
88°
62°
29
87°
64°
30
88°
64°
1
87°
63°
2
83°
58°
3
86°
64°
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 83° to 97°, with overnight lows between 58° and 70°. The average high for September is 89° with an average low of 64°. 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.
