S
M
T
W
T
F
S
30
94°
73°
31
93°
73°
1
92°
72°
2
94°
73°
3
95°
72°
4
94°
73°
5
93°
71°
6
93°
71°
7
92°
70°
8
94°
71°
9
94°
71°
10
94°
70°
11
94°
71°
12
94°
70°
13
92°
71°
14
92°
67°
15
93°
68°
16
94°
69°
17
93°
68°
18
93°
62°
19
88°
59°
20
82°
58°
21
84°
65°
22
86°
64°
23
89°
64°
24
89°
63°
25
88°
64°
26
89°
63°
27
86°
62°
28
85°
62°
29
81°
59°
30
81°
62°
1
86°
61°
2
86°
61°
3
85°
60°
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 81° to 95°, with overnight lows between 58° and 73°. The average high for September is 90° 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.
