S
M
T
W
T
F
S
30
95°
61°
31
97°
67°
1
100°
70°
2
100°
72°
3
99°
72°
4
101°
73°
5
103°
73°
6
98°
74°
7
92°
65°
8
96°
62°
9
102°
70°
10
93°
74°
11
81°
68°
12
90°
65°
13
92°
68°
14
91°
70°
15
98°
71°
16
96°
69°
17
92°
64°
18
83°
59°
19
79°
55°
20
76°
53°
21
80°
53°
22
81°
54°
23
81°
55°
24
79°
52°
25
84°
59°
26
83°
58°
27
83°
57°
28
82°
57°
29
83°
58°
30
82°
57°
1
81°
55°
2
79°
55°
3
81°
54°
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 76° to 98°, with overnight lows between 52° and 71°. The average high for September is 84° with an average low of 59°. 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.
