S
M
T
W
T
F
S
31
80°
62°
1
83°
59°
2
83°
59°
3
82°
64°
4
87°
59°
5
90°
64°
6
92°
71°
7
83°
63°
8
82°
63°
9
76°
60°
10
75°
65°
11
74°
65°
12
81°
61°
13
81°
60°
14
78°
58°
15
74°
64°
16
69°
62°
17
73°
61°
18
77°
64°
19
89°
60°
20
87°
59°
21
84°
62°
22
84°
58°
23
89°
60°
24
90°
68°
25
92°
72°
26
92°
72°
27
82°
71°
28
78°
70°
29
77°
68°
30
80°
67°
1
77°
58°
2
75°
55°
3
79°
52°
4
82°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Williamston
Williamston's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Williamston. See also: October | November | December.