S
M
T
W
T
F
S
30
95°
63°
31
95°
70°
1
98°
70°
2
99°
70°
3
100°
71°
4
101°
72°
5
101°
73°
6
91°
69°
7
90°
61°
8
95°
62°
9
96°
72°
10
89°
69°
11
82°
69°
12
87°
68°
13
92°
71°
14
92°
71°
15
95°
68°
16
87°
68°
17
88°
66°
18
85°
63°
19
77°
55°
20
77°
57°
21
78°
56°
22
81°
55°
23
83°
60°
24
84°
62°
25
84°
60°
26
83°
59°
27
83°
59°
28
82°
58°
29
83°
59°
30
82°
59°
1
77°
57°
2
78°
56°
3
81°
57°
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 77° to 96°, with overnight lows between 55° and 72°. The average high for September is 84° with an average low of 62°. 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.
