Loudoun County (Leesburg)
September
Weather in Loudoun County, Virginia for September 2027
Your guide to Loudoun County weather in September - trends and predictions
In general, the average temperature in Loudoun County at the beginning of September is 28.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.7 °C by the end of September.
The climate of Loudoun County in September is notably wet, with an average of 12 rainy days, and a total of 127.6 mm of precipitation.
Is September a good time to visit Loudoun County? check out the best time to travel to Loudoun County page.
✨ Is September a good time to visit Loudoun County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
18
Dry days
12
Rainy days
0
Snow days
25°/15°
Temperatures
15 km/h
Avg max wind
73 %
Avg humidity
Loudoun County Weather September
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Temperatures trend during September in Loudoun County
See the weather trend as well as the moving average line
September weather in Loudoun County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 30° /18° | 2.2 mm | 7 | |
| Sept. 2 |  Light rain | 28° /16° | 8.3 mm | 6 | |
| Sept. 3 | Light rain | 28° /15° | 4.2 mm | 7 | |
| Sept. 4 |  Moderate rain | 30° /16° | 11.3 mm | 5 | |
| Sept. 5 | Light rain | 28° /16° | 4.1 mm | 6 | |
| Sept. 6 | Light rain | 28° /16° | 5.9 mm | 7 | |
| Sept. 7 | Patchy rain possible | 24° /15° | 1.2 mm | 6 | |
| Sept. 8 |  Sunny | 25° /10° | 0 mm | 6 | |
| Sept. 9 | Sunny | 27° /12° | 0 mm | 6 | |
| Sept. 10 | Sunny | 27° /14° | 0.6 mm | 5 | |
| Sept. 11 | Sunny | 27° /16° | 0.1 mm | 5 | |
| Sept. 12 | Patchy rain possible | 27° /15° | 1.2 mm | 5 | |
| Sept. 13 | Patchy rain possible | 28° /17° | 1.2 mm | 5 | |
| Sept. 14 |  Overcast | 27° /16° | 0 mm | 6 | |
| Sept. 15 | Patchy rain possible | 27° /14° | 1.3 mm | 7 | |
| Sept. 16 | Overcast | 25° /14° | 0.6 mm | 6 | |
| Sept. 17 |  Moderate or heavy rain shower | 23° /17° | 9.8 mm | 5 | |
| Sept. 18 | Light rain | 26° /18° | 4.3 mm | 5 | |
| Sept. 19 | Patchy rain possible | 27° /16° | 1.2 mm | 6 | |
| Sept. 20 | Light rain | 24° /16° | 4.4 mm | 4 | |
| Sept. 21 | Light rain | 23° /16° | 6.8 mm | 4 | |
| Sept. 22 | Light rain | 21° /14° | 7.9 mm | 4 | |
| Sept. 23 | Moderate rain at times | 23° /15° | 7.2 mm | 4 | |
| Sept. 24 | Moderate or heavy rain shower | 22° /15° | 7.7 mm | 4 | |
| Sept. 25 | Moderate rain at times | 23° /14° | 9.6 mm | 5 | |
| Sept. 26 | Light rain | 25° /17° | 2.9 mm | 6 | |
| Sept. 27 | Moderate rain | 22° /16° | 12.5 mm | 4 | |
| Sept. 28 | Light rain | 22° /17° | 9.7 mm | 4 | |
| Sept. 29 | Patchy rain possible | 23° /16° | 1.4 mm | 4 | |
| Sept. 30 | Overcast | 23° /15° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Loudoun 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 Loudoun County forecast closer to your planned date for the most up-to-date weather information.
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Loudoun County in September - FAQ
What are the expected maximum and minimum temperatures in Loudoun County during September?
During September, expect a variety of temperatures with highs around 25° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Loudoun County during September?
Significant rainfall exceeding 127.6 mm is expected in Loudoun County during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Loudoun County during September?
The average wind speed in Loudoun County during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Loudoun County
Explore the daily rainfall trends and prepare for Loudoun Countys September weather 💧
Typically, Loudoun County has 12 rainy days in September with a total of 127.6 mm of rainfall.
UV exposure in Loudoun County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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