S
M
T
W
T
F
S
31
76°
44°
1
78°
47°
2
80°
47°
3
78°
53°
4
67°
47°
5
68°
47°
6
63°
46°
7
68°
42°
8
68°
37°
9
75°
46°
10
79°
50°
11
79°
48°
12
82°
50°
13
77°
54°
14
83°
52°
15
85°
53°
16
82°
51°
17
83°
50°
18
87°
52°
19
83°
58°
20
82°
54°
21
77°
58°
22
80°
61°
23
72°
59°
24
73°
61°
25
76°
60°
26
80°
52°
27
86°
54°
28
81°
55°
29
84°
51°
30
82°
49°
1
73°
50°
2
78°
43°
3
87°
50°
4
88°
59°
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.