S
M
T
W
T
F
S
30
88°
71°
31
93°
71°
1
96°
71°
2
97°
74°
3
97°
76°
4
96°
76°
5
96°
75°
6
93°
72°
7
82°
70°
8
86°
67°
9
90°
66°
10
93°
69°
11
93°
71°
12
80°
69°
13
88°
70°
14
91°
70°
15
84°
68°
16
86°
66°
17
84°
66°
18
81°
65°
19
79°
59°
20
75°
57°
21
73°
58°
22
74°
57°
23
77°
60°
24
78°
59°
25
78°
60°
26
77°
60°
27
79°
61°
28
80°
62°
29
80°
63°
30
79°
63°
1
79°
61°
2
78°
60°
3
79°
61°
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 73° to 93°, with overnight lows between 57° and 71°. The average high for September is 81° with an average low of 63°. 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.
