S
M
T
W
T
F
S
30
100°
70°
31
98°
73°
1
94°
72°
2
95°
72°
3
94°
73°
4
93°
72°
5
92°
73°
6
93°
74°
7
98°
72°
8
97°
72°
9
95°
71°
10
93°
72°
11
90°
69°
12
91°
70°
13
90°
69°
14
88°
65°
15
84°
69°
16
85°
68°
17
87°
68°
18
87°
67°
19
86°
68°
20
85°
68°
21
83°
67°
22
83°
67°
23
87°
66°
24
87°
66°
25
88°
65°
26
87°
66°
27
88°
65°
28
88°
64°
29
87°
63°
30
88°
65°
1
87°
64°
2
85°
64°
3
85°
63°
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 98°, with overnight lows between 63° and 74°. The average high for September is 89° with an average low of 68°. 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.
