S
M
T
W
T
F
S
30
87°
71°
31
91°
68°
1
96°
71°
2
97°
72°
3
97°
72°
4
95°
72°
5
95°
72°
6
90°
68°
7
82°
70°
8
84°
64°
9
88°
63°
10
91°
64°
11
93°
70°
12
82°
68°
13
90°
66°
14
92°
70°
15
83°
62°
16
86°
62°
17
87°
65°
18
87°
68°
19
87°
69°
20
85°
66°
21
76°
62°
22
70°
59°
23
75°
61°
24
77°
59°
25
76°
61°
26
80°
62°
27
83°
61°
28
83°
61°
29
83°
61°
30
82°
60°
1
80°
59°
2
83°
61°
3
84°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Spartanburg
Spartanburg's September 2026 forecast shows daily high temperatures ranging from 70° to 92°, with overnight lows between 59° and 70°. The average high for September is 82° 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 Spartanburg. See also: October | November | December.
