S
M
T
W
T
F
S
30
88°
69°
31
92°
70°
1
97°
73°
2
99°
74°
3
98°
75°
4
98°
75°
5
92°
70°
6
86°
65°
7
85°
65°
8
84°
64°
9
83°
66°
10
84°
66°
11
88°
67°
12
84°
65°
13
83°
62°
14
84°
65°
15
85°
68°
16
82°
68°
17
81°
67°
18
81°
63°
19
78°
61°
20
78°
63°
21
79°
65°
22
81°
66°
23
82°
65°
24
83°
66°
25
82°
65°
26
80°
66°
27
81°
65°
28
80°
65°
29
78°
64°
30
80°
63°
1
75°
63°
2
76°
62°
3
79°
62°
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 75° to 99°, with overnight lows between 61° and 75°. The average high for September is 84° with an average low of 66°. 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.
