September
Weather in Rhode Island for September 2025
Your guide to Rhode Island weather in September - trends and predictions
In general, the average temperature in Rhode Island at the beginning of September is 27.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.7 °F by the end of September.
The climate of Rhode Island in September is notably wet, with an average of 11 rainy days.
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19
Dry days
11
Rainy days
0
Snow days
24°/14°
Temperatures
15 km/h
Avg max wind
77 %
Avg humidity
Rhode Island in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  27° | 3  27° | 4 28° | 5  29° | 6 28° | 7  29° |
| 8 25° | 9 27° | 10 27° | 11  27° | 12 25° | 13  26° | 14 26° |
| 15 22° | 16  24° | 17 24° | 18 20° | 19 21° | 20 21° | 21 19° |
| 22 19° | 23  17° | 24 18° | 25 17° | 26 18° | 27 20° | 28 21° |
| 29 18° | 30 19° |
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Temperatures trend during September in Rhode Island
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 26° /14° | 1.6 mm | 7 | |
| Sept. 2 | Overcast | 27° /14° | 0 mm | 7 | |
| Sept. 3 | Partly cloudy | 27° /13° | 0 mm | 7 | |
| Sept. 4 | Overcast | 28° /14° | 0 mm | 7 | |
| Sept. 5 | Mist | 29° /15° | 0 mm | 7 | |
| Sept. 6 | Overcast | 28° /16° | 0.1 mm | 6 | |
| Sept. 7 | Thundery outbreaks possible | 29° /17° | 4.7 mm | 7 | |
| Sept. 8 | Fog | 25° /15° | 0.1 mm | 7 | |
| Sept. 9 | Fog | 27° /16° | 0.2 mm | 7 | |
| Sept. 10 | Fog | 27° /16° | 1.5 mm | 7 | |
| Sept. 11 | Light rain shower | 27° /14° | 1.1 mm | 7 | |
| Sept. 12 | Fog | 25° /15° | 0.6 mm | 6 | |
| Sept. 13 | Moderate rain | 26° /16° | 3.6 mm | 6 | |
| Sept. 14 | Mist | 26° /15° | 0 mm | 6 | |
| Sept. 15 | Overcast | 22° /13° | 0 mm | 5 | |
| Sept. 16 | Patchy light drizzle | 24° /13° | 0.2 mm | 6 | |
| Sept. 17 | Partly cloudy | 24° /12° | 0 mm | 6 | |
| Sept. 18 | Moderate rain | 20° /15° | 16.1 mm | 5 | |
| Sept. 19 | Sunny | 21° /15° | 19.5 mm | 5 | |
| Sept. 20 | Partly cloudy | 21° /13° | 7.9 mm | 5 | |
| Sept. 21 | Sunny | 19° /12° | 0.8 mm | 5 | |
| Sept. 22 | Mist | 19° /12° | 0 mm | 5 | |
| Sept. 23 | Heavy rain | 17° /13° | 30.2 mm | 4 | |
| Sept. 24 | Mist | 18° /13° | 0 mm | 4 | |
| Sept. 25 | Heavy rain | 17° /12° | 35.1 mm | 4 | |
| Sept. 26 | Patchy rain possible | 18° /11° | 16.6 mm | 4 | |
| Sept. 27 | Fog | 20° /11° | 3.2 mm | 5 | |
| Sept. 28 | Fog | 21° /11° | 0 mm | 5 | |
| Sept. 29 | Fog | 18° /11° | 0 mm | 5 | |
| Sept. 30 | Light drizzle | 19° /11° | 1.9 mm | 5 | |
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Important Notice
Our weather forecast for Rhode Island in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Rhode Island forecast closer to your planned date for the most up-to-date weather information.
Rhode Island in September - FAQ
What are the expected maximum and minimum temperatures in Rhode Island during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Rhode Island during September?
Significant rainfall exceeding 181.7 mm is expected in Rhode Island during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Rhode Island during September?
The average wind speed in Rhode Island during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Rhode Island
Explore the daily rainfall trends and prepare for Rhode Islands September weather 💧
UV exposure in Rhode Island during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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