S
M
T
W
T
F
S
30
90°
71°
31
90°
73°
1
92°
73°
2
92°
73°
3
90°
75°
4
90°
75°
5
91°
74°
6
93°
71°
7
90°
71°
8
90°
74°
9
91°
75°
10
89°
75°
11
87°
75°
12
86°
73°
13
90°
74°
14
96°
75°
15
90°
74°
16
93°
69°
17
91°
67°
18
93°
68°
19
90°
70°
20
89°
71°
21
89°
71°
22
88°
69°
23
88°
70°
24
87°
68°
25
87°
66°
26
87°
65°
27
84°
64°
28
87°
65°
29
86°
62°
30
86°
66°
1
86°
66°
2
86°
66°
3
86°
65°
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 84° to 93°, with overnight lows between 62° and 71°. The average high for September is 88° with an average low of 67°. 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.
