Ashburn (VA)
September
Weather in Ashburn, Virginia for September 2026
Your guide to Ashburn weather in September - trends and predictions
In general, the average temperature in Ashburn at the beginning of September is 26.3 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 23.7 °F by the end of September.
The climate of Ashburn in September is notably wet, with an average of 15 rainy days, and a total of 169.3 mm of precipitation.
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Temperatures
Rain 🌧️
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15
Dry days
15
Rainy days
0
Snow days
25°/16°
Temperatures
15 km/h
Avg max wind
76 %
Avg humidity
Ashburn Weather September
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Temperatures trend during September in Ashburn
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September weather in Ashburn day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 24° /12° | 0 mm | 5 | |
| Sept. 2 |  Cloudy | 24° /12° | 0 mm | 5 | |
| Sept. 3 |  Partly cloudy | 24° /16° | 0 mm | 6 | |
| Sept. 4 |  Moderate rain at times | 30° /17° | 26.5 mm | 7 | |
| Sept. 5 |  Fog | 30° /17° | 12.2 mm | 7 | |
| Sept. 6 | Moderate or heavy rain shower | 30° /20° | 17.6 mm | 7 | |
| Sept. 7 | Overcast | 22° /15° | 0 mm | 5 | |
| Sept. 8 |  Sunny | 22° /9° | 0 mm | 6 | |
| Sept. 9 | Sunny | 25° /9° | 0 mm | 7 | |
| Sept. 10 | Sunny | 26° /10° | 0 mm | 6 | |
| Sept. 11 | Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 12 | Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 13 |  Patchy rain possible | 27° /14° | 0.1 mm | 7 | |
| Sept. 14 | Overcast | 29° /16° | 0 mm | 6 | |
| Sept. 15 | Partly cloudy | 28° /16° | 0.8 mm | 7 | |
| Sept. 16 | Overcast | 23° /13° | 0.9 mm | 5 | |
| Sept. 17 | Moderate or heavy rain shower | 19° /15° | 14.3 mm | 5 | |
| Sept. 18 | Moderate or heavy rain shower | 25° /17° | 6 mm | 6 | |
| Sept. 19 | Overcast | 28° /15° | 1.8 mm | 7 | |
| Sept. 20 | Overcast | 24° /13° | 2.2 mm | 5 | |
| Sept. 21 | Patchy rain possible | 24° /16° | 2.8 mm | 6 | |
| Sept. 22 | Patchy rain possible | 24° /15° | 2.5 mm | 6 | |
| Sept. 23 | Moderate rain at times | 26° /17° | 8.1 mm | 6 | |
| Sept. 24 | Moderate or heavy rain shower | 23° /17° | 11.5 mm | 6 | |
| Sept. 25 | Moderate rain at times | 24° /17° | 14.4 mm | 6 | |
| Sept. 26 | Patchy rain possible | 27° /19° | 1.3 mm | 6 | |
| Sept. 27 | Moderate or heavy rain shower | 24° /18° | 16.7 mm | 6 | |
| Sept. 28 | Patchy rain possible | 22° /18° | 10.4 mm | 5 | |
| Sept. 29 |  Heavy rain at times | 24° /16° | 2.2 mm | 6 | |
| Sept. 30 | Overcast | 22° /16° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Ashburn 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 Ashburn forecast closer to your planned date for the most up-to-date weather information.
Change Month
Ashburn in September - FAQ
What are the expected maximum and minimum temperatures in Ashburn during September?
During September, expect a variety of temperatures with highs around 25° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Ashburn during September?
Significant rainfall exceeding 169.3 mm is expected in Ashburn during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Ashburn during September?
The average wind speed in Ashburn during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Ashburn
Explore the daily rainfall trends and prepare for Ashburns September weather 💧
UV exposure in Ashburn during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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