Click on a day for an hourly weather forecast
The temperatures in Rhode Island in September are comfortable with low of 16°C and and high up to 23°C.
You can expect about 3 to 8 days of rain in Rhode Island during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Rhode Island in September 2025.
If you’re planning to visit Rhode Island in the near future, we highly recommend that you review the 14 day weather forecast for Rhode Island before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -4° | 6 | 17 | 8 | 87 mm | Awful | Rhode Island in January |
| February | 3° / -3° | 5 | 14 | 9 | 90 mm | Awful | Rhode Island in February |
| March | 7° / 0° | 6 | 18 | 7 | 100 mm | Bad | Rhode Island in March |
| April | 12° / 5° | 7 | 22 | 1 | 92 mm | Bad | Rhode Island in April |
| May | 18° / 11° | 5 | 26 | 0 | 78 mm | Good | Rhode Island in May |
| June | 22° / 15° | 6 | 24 | 0 | 93 mm | Good | Rhode Island in June |
| July | 26° / 19° | 6 | 25 | 0 | 101 mm | Perfect | Rhode Island in July |
| August | 26° / 19° | 6 | 25 | 0 | 94 mm | Perfect | Rhode Island in August |
| September | 23° / 16° | 4 | 26 | 0 | 66 mm | Perfect | Rhode Island in September |
| October | 17° / 11° | 5 | 26 | 0 | 106 mm | Good | Rhode Island in October |
| November | 10° / 5° | 5 | 24 | 1 | 72 mm | Ok | Rhode Island in November |
| December | 5° / 0° | 6 | 20 | 5 | 91 mm | Awful | Rhode Island in December |