Arlington (VA)
September
Weather in Arlington, Virginia for September 2026
Your guide to Arlington weather in September - trends and predictions
So far, September 2026 in Arlington shows a warmer trend than usual by 3.3 °F.
Expect cooler weather in the next days in Arlington with the forecast suggesting a temperature of 25.6 °F, lower than the historical average.
In general, the average temperature in Arlington at the beginning of September is 30.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.1 °F by the end of September.
Arlington experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 207.1 mm.
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Temperatures
Rain 🌧️
More
9
Dry days
21
Rainy days
0
Snow days
26°/17°
Temperatures
13 km/h
Avg max wind
69 %
Avg humidity
Arlington Weather September
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Temperatures trend during September in Arlington
See the weather trend as well as the moving average line
September weather in Arlington day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 31° /19° | 0.3 mm | 7 | |
| Sept. 2 | Sunny | 29° /18° | 2.1 mm | 7 | |
| Sept. 3 | Sunny | 31° /17° | 0 mm | 7 | |
| Sept. 4 |  Patchy rain possible | 33° /18° | 1.7 mm | 7 | |
| Sept. 5 | Sunny | 32° /19° | 1.9 mm | 7 | |
| Sept. 6 | Sunny | 32° /19° | 7.6 mm | 8 | |
| Sept. 7 |  Thundery outbreaks possible | 28° /18° | 6.3 mm | 7 | |
| Sept. 8 | Sunny | 29° /15° | 1.5 mm | 7 | |
| Sept. 9 | Light rain shower | 28° /15° | 1.5 mm | 6 | |
| Sept. 10 | Light rain shower | 29° /18° | 3.4 mm | 6 | |
| Sept. 11 | Patchy rain possible | 29° /23° | 1 mm | 2.8 | |
| Sept. 12 | Light rain shower | 27° /21° | 5.1 mm | 5 | |
| Sept. 13 |  Overcast | 31° /22° | 5 mm | 6.3 | |
| Sept. 14 | Overcast | 28° /22° | 0 mm | 6 | |
| Sept. 15 | Sunny | 26° /19° | 0 mm | 7 | |
| Sept. 16 | Sunny | 33° /17° | 0 mm | 8 | |
| Sept. 17 | Sunny | 34° /22° | 2.9 mm | 8 | |
| Sept. 18 | Sunny | 23° /16° | 10.1 mm | 6 | |
| Sept. 19 | Patchy rain possible | 22° /15° | 1.2 mm | 5 | |
| Sept. 20 | Patchy rain possible | 24° /17° | 0.6 mm | 6 | |
| Sept. 21 | Overcast | 21° /13° | 4.1 mm | 5 | |
| Sept. 22 | Light rain shower | 15° /13° | 8.6 mm | 4 | |
| Sept. 23 | Overcast | 22° /13° | 1.2 mm | 6 | |
| Sept. 24 | Overcast | 23° /16° | 0 mm | 5 | |
| Sept. 25 | Patchy rain possible | 24° /18° | 14.2 mm | 5 | |
| Sept. 26 |  Fog | 23° /19° | 5 mm | 5 | |
| Sept. 27 | Patchy rain possible | 22° /17° | 13.3 mm | 5 | |
| Sept. 28 | Overcast | 23° /16° | 2.9 mm | 5 | |
| Sept. 29 | Fog | 24° /17° | 1.1 mm | 5 | |
| Sept. 30 | Patchy rain possible | 23° /17° | 0.4 mm | 5 | |
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Important Notice
Our weather forecast for Arlington 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 forecast closer to your planned date for the most up-to-date weather information.
Change Month
Arlington in September - FAQ
What are the expected maximum and minimum temperatures in Arlington 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 during September?
Significant rainfall exceeding 207.1 mm is expected in Arlington during September, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Arlington during September?
The average wind speed in Arlington during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Arlington
Explore the daily rainfall trends and prepare for Arlingtons September weather 💧
Typically, Arlington has 21 rainy days in September with a total of 207.1 mm of rainfall.
UV exposure in Arlington during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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