S
M
T
W
T
F
S
30
79°
49°
31
72°
47°
1
70°
46°
2
70°
47°
3
71°
45°
4
69°
47°
5
69°
46°
6
70°
47°
7
70°
51°
8
72°
51°
9
68°
46°
10
68°
46°
11
69°
47°
12
68°
45°
13
69°
48°
14
68°
49°
15
67°
45°
16
67°
43°
17
65°
42°
18
66°
43°
19
65°
50°
20
71°
48°
21
64°
41°
22
63°
40°
23
Hist. Avg.
68°
46°
24
Hist. Avg.
68°
46°
25
Hist. Avg.
67°
46°
26
Hist. Avg.
67°
45°
27
Hist. Avg.
66°
45°
28
Hist. Avg.
66°
44°
29
Hist. Avg.
66°
44°
30
Hist. Avg.
65°
44°
1
Hist. Avg.
65°
43°
2
Hist. Avg.
64°
43°
3
Hist. Avg.
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rhode Island
Rhode Island's September 2026 forecast shows daily high temperatures ranging from 63° to 79°, with overnight lows between 40° and 51°. The average high for September is 69° with an average low of 46°. 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 Rhode Island. See also: October | November | December.
