S
M
T
W
T
F
S
30
80°
55°
31
74°
64°
1
70°
60°
2
74°
59°
3
81°
66°
4
84°
59°
5
78°
57°
6
75°
51°
7
77°
56°
8
80°
60°
9
75°
66°
10
78°
57°
11
72°
56°
12
76°
59°
13
74°
58°
14
76°
60°
15
78°
59°
16
79°
57°
17
75°
59°
18
69°
54°
19
74°
60°
20
75°
59°
21
72°
57°
22
70°
58°
23
71°
59°
24
74°
58°
25
70°
57°
26
73°
59°
27
74°
59°
28
73°
55°
29
66°
53°
30
66°
54°
1
65°
52°
2
64°
54°
3
65°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Westerly
Westerly's September 2026 forecast shows daily high temperatures ranging from 64° to 84°, with overnight lows between 51° and 66°. The average high for September is 74° with an average low of 58°. 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 Westerly. See also: October | November | December.
