Washington County (Fayetteville)
September
Weather in Washington County, Arkansas 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 -0.8 °F.
The forecast for the upcoming days in Washington County predicts a temperature of 29.9 °F, which is slightly above the historical average.
In general, the average temperature in Washington County at the beginning of September is 26.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 31.1 °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 77.5 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
28°/16°
Temperatures
16 km/h
Avg max wind
65 %
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 |  Moderate or heavy rain shower | 27° /20° | 4 mm | 6 | |
| Sept. 2 |  Sunny | 27° /17° | 5.1 mm | 7 | |
| Sept. 3 |  Partly cloudy | 26° /17° | 0 mm | 6 | |
| Sept. 4 |  Overcast | 26° /18° | 0 mm | 6 | |
| Sept. 5 |  Patchy rain possible | 28° /17° | 0.1 mm | 6 | |
| Sept. 6 | Patchy rain possible | 26° /15° | 3.4 mm | 6 | |
| Sept. 7 | Sunny | 25° /13° | 0 mm | 7 | |
| Sept. 8 | Sunny | 25° /12° | 0 mm | 6 | |
| Sept. 9 | Sunny | 25° /13° | 0 mm | 6 | |
| Sept. 10 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 11 | Moderate rain at times | 30° /20° | 0.8 mm | 7 | |
| Sept. 12 | Patchy rain possible | 29° /19° | 0.8 mm | 7 | |
| Sept. 13 | Patchy rain possible | 29° /20° | 1.5 mm | 7 | |
| Sept. 14 | Partly cloudy | 31° /18° | 0 mm | 7 | |
| Sept. 15 | Overcast | 29° /19° | 2.9 mm | 7 | |
| Sept. 16 | Patchy rain possible | 29° /19° | 0.3 mm | 7 | |
| Sept. 17 | Sunny | 33° /22° | 0 mm | 1.7 | |
| Sept. 18 | Patchy rain possible | 31° /17° | 3.9 mm | 1.5 | |
| Sept. 19 |  Moderate rain | 30° /22° | 13.1 mm | 1.4 | |
| Sept. 20 | Sunny | 32° /18° | 0.1 mm | 1.7 | |
| Sept. 21 | Patchy rain possible | 31° /21° | 0.3 mm | 0 | |
| Sept. 22 | Moderate rain | 20° /18° | 8.4 mm | 4 | |
| Sept. 23 | Moderate rain | 24° /18° | 8.4 mm | 4 | |
| Sept. 24 | Sunny | 28° /16° | 0 mm | 6 | |
| Sept. 25 | Sunny | 30° /17° | 0 mm | 6 | |
| Sept. 26 | Sunny | 32° /20° | 0 mm | 7 | |
| Sept. 27 | Sunny | 32° /21° | 0 mm | 7 | |
| Sept. 28 | Sunny | 32° /21° | 0 mm | 7 | |
| Sept. 29 | Sunny | 33° /20° | 0 mm | 7 | |
| Sept. 30 | Sunny | 31° /18° | 0 mm | 6 | |
| Next | |||||
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.
Change Month
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 28° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Washington County during September?
Moderate rainfall is anticipated in Washington County during September, with a total of 77.5 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Washington County during September?
The average wind speed in Washington County during September is 16 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 36.063 and longitude -94.157. Stay updated with localized weather information tailored for Washington County.
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