Arlington County (Arlington)
September
Weather in Arlington County, Virginia for September 2027
Your guide to Arlington County weather in September - trends and predictions
In general, the average temperature in Arlington County at the beginning of September is 30.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.3 °C by the end of September.
The climate of Arlington County in September is notably wet, with an average of 12 rainy days, and a total of 193.9 mm of precipitation.
Is September a good time to visit Arlington County? check out the best time to travel to Arlington County page.
✨ Is September a good time to visit Arlington County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
18
Dry days
12
Rainy days
0
Snow days
26°/17°
Temperatures
13 km/h
Avg max wind
70 %
Avg humidity
Arlington County Weather September
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Temperatures trend during September in Arlington County
See the weather trend as well as the moving average line
September weather in Arlington County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 31° /19° | 0.3 mm | 7 | |
| Sept. 2 |  Patchy rain possible | 29° /18° | 2.1 mm | 7 | |
| Sept. 3 | Sunny | 31° /17° | 0 mm | 7 | |
| Sept. 4 | Patchy rain possible | 32° /19° | 1.7 mm | 7 | |
| Sept. 5 | Patchy rain possible | 31° /20° | 1.9 mm | 7 | |
| Sept. 6 |  Light rain | 31° /20° | 7.6 mm | 8 | |
| Sept. 7 |  Thundery outbreaks possible | 28° /18° | 6.3 mm | 7 | |
| Sept. 8 | Patchy rain possible | 29° /15° | 1.5 mm | 7 | |
| Sept. 9 | Light rain shower | 28° /16° | 1.5 mm | 6 | |
| Sept. 10 | Light rain | 29° /18° | 3.4 mm | 6 | |
| Sept. 11 |  Moderate rain | 29° /18° | 11.1 mm | 6 | |
| Sept. 12 | Patchy rain possible | 29° /18° | 2.1 mm | 6 | |
| Sept. 13 | Patchy rain possible | 29° /19° | 2.4 mm | 6 | |
| Sept. 14 | Sunny | 28° /18° | 0 mm | 7 | |
| Sept. 15 |  Partly cloudy | 27° /16° | 0 mm | 7 | |
| Sept. 16 | Light rain | 25° /16° | 2.8 mm | 6 | |
| Sept. 17 | Moderate rain | 22° /17° | 24 mm | 5 | |
| Sept. 18 | Moderate rain | 26° /19° | 10.5 mm | 5 | |
| Sept. 19 | Sunny | 27° /17° | 0.1 mm | 6 | |
| Sept. 20 | Light rain | 26° /18° | 4.1 mm | 5 | |
| Sept. 21 | Moderate rain | 24° /17° | 10.3 mm | 5 | |
| Sept. 22 | Light rain | 22° /16° | 6.9 mm | 4 | |
| Sept. 23 |  Heavy rain | 22° /16° | 38 mm | 4 | |
| Sept. 24 | Moderate rain | 21° /17° | 24.3 mm | 4 | |
| Sept. 25 | Moderate rain | 23° /16° | 10.6 mm | 5 | |
| Sept. 26 | Light rain | 22° /18° | 5.5 mm | 5 | |
| Sept. 27 | Moderate rain | 21° /17° | 11.7 mm | 4 | |
| Sept. 28 | Patchy rain possible | 22° /16° | 2.2 mm | 4 | |
| Sept. 29 |  Fog | 23° /18° | 0.8 mm | 5 | |
| Sept. 30 |  Overcast | 24° /17° | 0.3 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Arlington 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 Arlington County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Arlington County in September - FAQ
What are the expected maximum and minimum temperatures in Arlington County during September?
During September, expect a variety of temperatures with highs around 26° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Arlington County during September?
Significant rainfall exceeding 193.9 mm is expected in Arlington 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 Arlington County during September?
The average wind speed in Arlington County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Arlington County
Explore the daily rainfall trends and prepare for Arlington Countys September weather 💧
Typically, Arlington County has 12 rainy days in September with a total of 193.9 mm of rainfall.
UV exposure in Arlington County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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