S
M
T
W
T
F
S
30
84°
61°
31
85°
63°
1
83°
61°
2
84°
62°
3
82°
62°
4
82°
61°
5
81°
61°
6
81°
60°
7
80°
61°
8
80°
60°
9
79°
59°
10
80°
60°
11
81°
59°
12
81°
59°
13
80°
60°
14
80°
59°
15
78°
59°
16
79°
58°
17
78°
57°
18
75°
56°
19
74°
48°
20
70°
49°
21
70°
57°
22
71°
48°
23
70°
48°
24
68°
49°
25
70°
54°
26
74°
53°
27
69°
51°
28
68°
48°
29
67°
47°
30
67°
46°
1
69°
52°
2
70°
54°
3
69°
48°
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 67° to 85°, with overnight lows between 46° and 63°. The average high for September is 76° with an average low of 56°. 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.
