S
M
T
W
T
F
S
30
76°
58°
31
77°
57°
1
75°
57°
2
74°
58°
3
74°
60°
4
73°
60°
5
76°
57°
6
75°
58°
7
73°
57°
8
74°
56°
9
72°
56°
10
73°
62°
11
72°
55°
12
74°
55°
13
76°
54°
14
74°
61°
15
75°
60°
16
74°
56°
17
71°
54°
18
71°
54°
19
72°
57°
20
73°
59°
21
74°
58°
22
71°
57°
23
75°
58°
24
73°
56°
25
74°
57°
26
68°
49°
27
73°
50°
28
66°
51°
29
65°
51°
30
65°
49°
1
Hist. Avg.
67°
48°
2
Hist. Avg.
66°
48°
3
Hist. Avg.
66°
47°
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 65° to 77°, with overnight lows between 49° and 62°. The average high for September is 73° with an average low of 56°. 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.
