S
M
T
W
T
F
S
30
86°
65°
31
85°
67°
1
86°
69°
2
84°
66°
3
83°
64°
4
82°
63°
5
82°
62°
6
83°
63°
7
84°
63°
8
86°
65°
9
87°
65°
10
86°
62°
11
87°
62°
12
87°
67°
13
86°
66°
14
87°
67°
15
86°
67°
16
85°
66°
17
86°
63°
18
84°
64°
19
83°
63°
20
84°
63°
21
83°
64°
22
82°
60°
23
78°
58°
24
Hist. Avg.
80°
60°
25
Hist. Avg.
80°
59°
26
Hist. Avg.
80°
59°
27
Hist. Avg.
79°
58°
28
Hist. Avg.
79°
58°
29
Hist. Avg.
79°
58°
30
Hist. Avg.
78°
57°
1
Hist. Avg.
78°
57°
2
Hist. Avg.
78°
56°
3
Hist. Avg.
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Greer
Greer's September 2026 forecast shows daily high temperatures ranging from 78° to 87°, with overnight lows between 58° and 69°. The average high for September is 84° with an average low of 64°. 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 Greer. See also: October | November | December.
