S
M
T
W
T
F
S
30
86°
67°
31
90°
67°
1
94°
71°
2
95°
71°
3
97°
71°
4
95°
71°
5
94°
68°
6
83°
65°
7
83°
62°
8
83°
63°
9
87°
64°
10
91°
64°
11
87°
63°
12
88°
65°
13
86°
62°
14
88°
64°
15
83°
58°
16
77°
62°
17
76°
61°
18
74°
61°
19
75°
60°
20
76°
60°
21
75°
59°
22
78°
61°
23
80°
60°
24
74°
59°
25
74°
60°
26
78°
59°
27
79°
57°
28
78°
50°
29
71°
48°
30
71°
48°
1
72°
51°
2
72°
54°
3
71°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clemmons
Clemmons's September 2026 forecast shows daily high temperatures ranging from 71° to 97°, with overnight lows between 48° and 71°. The average high for September is 81° with an average low of 61°. 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 Clemmons. See also: October | November | December.