Washington County (South Kingstown)
September
Weather in Washington County, Rhode Island for September 2025
Your guide to Washington County weather in September - trends and predictions
Until now, September 2025 in Washington County is slightly cooler than the historical average by -1.2 °F.
The forecast for the next days in Washington County predicts temperatures to be around 21 °F, close to the historical average.
In general, the average temperature in Washington County at the beginning of September is 22.1 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 21.6 °F by the end of September.
Washington County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 112 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
20°/15°
Temperatures
20 km/h
Avg max wind
79 %
Avg humidity
Washington County Weather September
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Temperatures trend during September in Washington County
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September weather in Washington County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 23° /17° | 0.3 mm | 5 | |
| Sept. 2 |  Partly cloudy | 25° /16° | 0.1 mm | 6 | |
| Sept. 3 |  Sunny | 20° /12° | 0 mm | 5 | |
| Sept. 4 | Sunny | 21° /14° | 0 mm | 5 | |
| Sept. 5 | Sunny | 22° /16° | 0 mm | 6 | |
| Sept. 6 | Patchy rain possible | 23° /18° | 0.1 mm | 5 | |
| Sept. 7 |  Moderate or heavy rain shower | 21° /14° | 5.8 mm | 5 | |
| Sept. 8 | Sunny | 21° /11° | 0 mm | 6 | |
| Sept. 9 | Partly cloudy | 21° /13° | 0 mm | 6 | |
| Sept. 10 | Partly cloudy | 21° /15° | 0 mm | 5 | |
| Sept. 11 | Sunny | 23° /13° | 0 mm | 6 | |
| Sept. 12 | Sunny | 21° /14° | 0 mm | 6 | |
| Sept. 13 | Sunny | 23° /15° | 0 mm | 6 | |
| Sept. 14 | Sunny | 23° /16° | 0.1 mm | 6 | |
| Sept. 15 |  Cloudy | 21° /15° | 0 mm | 5 | |
| Sept. 16 | Partly cloudy | 20° /13° | 0 mm | 5 | |
| Sept. 17 |  Overcast | 19° /13° | 0 mm | 1.3 | |
| Sept. 18 |  Mist | 22° /17° | 0 mm | 1.3 | |
| Sept. 19 | Partly cloudy | 24° /18° | 0 mm | 1 | |
| Sept. 20 | Sunny | 20° /13° | 0 mm | 1.4 | |
| Sept. 21 | Sunny | 19° /12° | 0 mm | 0.1 | |
| Sept. 22 | Sunny | 21° /13° | 0 mm | 5 | |
| Sept. 23 | Sunny | 23° /15° | 0 mm | 5 | |
| Sept. 24 | Sunny | 23° /17° | 0 mm | 5 | |
| Sept. 25 | Mist | 23° /18° | 0 mm | 4 | |
| Sept. 26 | Patchy rain possible | 22° /17° | 1.5 mm | 4 | |
| Sept. 27 | Patchy rain possible | 20° /15° | 0.7 mm | 4 | |
| Sept. 28 | Patchy rain possible | 22° /14° | 0.6 mm | 4 | |
| Sept. 29 | Patchy rain possible | 19° /14° | 2.4 mm | 4 | |
| Sept. 30 | Patchy rain possible | 22° /15° | 0.3 mm | 4 | |
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Important Notice
Our weather forecast for Washington County 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 Washington County forecast closer to your planned date for the most up-to-date weather information.
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Washington County in September - FAQ
What are the expected maximum and minimum temperatures in Washington County during September?
During September, expect a variety of temperatures with highs around 20° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Washington County during September?
Significant rainfall exceeding 112 mm is expected in Washington County during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Washington County during September?
The average wind speed in Washington County during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Washington County
Explore the daily rainfall trends and prepare for Washington Countys September weather 💧
UV exposure in Washington County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Washington County?Get accurate weather forecasts for Washington County, located at latitude 41.447 and longitude -71.525. Stay updated with localized weather information tailored for Washington County.
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