Prince William County (Haymarket)
September
Weather in Prince William County, Virginia for September 2027
Your guide to Prince William County weather in September - trends and predictions
The climate of Prince William County in September is notably wet, with an average of 11 rainy days, and a total of 181.7 mm of precipitation.
Is September a good time to visit Prince William County? check out the best time to travel to Prince William County page.
✨ Is September a good time to visit Prince William County? – Ask the AI Weatherman
Rain 🌧️
More
19
Dry days
11
Rainy days
0
Snow days
26°/17°
Temperatures
13 km/h
Avg max wind
70 %
Avg humidity
Prince William County Weather September
Move between months or click on a day
Temperatures trend during September in Prince William County
See the weather trend as well as the moving average line
September weather in Prince William County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 31° /18° | 0 mm | 8.6 | |
| Sept. 2 |  Moderate rain | 31° /19° | 15.7 mm | 8 | |
| Sept. 3 |  Cloudy | 31° /18° | 0.1 mm | 8 | |
| Sept. 4 |  Patchy rain possible | 33° /19° | 2.4 mm | 8 | |
| Sept. 5 |  Mist | 30° /19° | 0.6 mm | 6 | |
| Sept. 6 | Moderate rain | 30° /19° | 14.8 mm | 8 | |
| Sept. 7 |  Light rain | 27° /16° | 5.7 mm | 6 | |
| Sept. 8 |  Sunny | 27° /13° | 0 mm | 8 | |
| Sept. 9 |  Partly cloudy | 28° /15° | 0 mm | 6 | |
| Sept. 10 | Overcast | 27° /18° | 0.2 mm | 4 | |
| Sept. 11 | Moderate rain | 26° /18° | 24.8 mm | 5 | |
| Sept. 12 | Patchy rain possible | 28° /17° | 1.5 mm | 5 | |
| Sept. 13 | Patchy rain possible | 29° /18° | 2.3 mm | 4 | |
| Sept. 14 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 15 | Cloudy | 27° /16° | 0 mm | 7 | |
| Sept. 16 | Overcast | 26° /16° | 0 mm | 6 | |
| Sept. 17 |  Heavy rain | 23° /16° | 32.4 mm | 3 | |
| Sept. 18 | Mist | 29° /19° | 0.2 mm | 5 | |
| Sept. 19 | Sunny | 29° /18° | 0.2 mm | 5 | |
| Sept. 20 | Heavy rain | 25° /19° | 27.9 mm | 3 | |
| Sept. 21 | Light rain | 23° /17° | 3 mm | 2 | |
| Sept. 22 | Light rain | 22° /15° | 7.2 mm | 4 | |
| Sept. 23 |  Thundery outbreaks possible | 23° /15° | 18.5 mm | 4 | |
| Sept. 24 | Partly cloudy | 23° /15° | 0 mm | 4 | |
| Sept. 25 | Moderate rain | 25° /14° | 11.7 mm | 3 | |
| Sept. 26 | Light rain | 23° /16° | 3.1 mm | 4 | |
| Sept. 27 | Patchy rain possible | 22° /16° | 1.1 mm | 2 | |
| Sept. 28 | Light rain | 20° /15° | 6.3 mm | 1 | |
| Sept. 29 | Fog | 25° /17° | 0 mm | 2 | |
| Sept. 30 | Patchy rain possible | 26° /16° | 1.8 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Prince William 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 Prince William County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Prince William County in September - FAQ
What are the expected maximum and minimum temperatures in Prince William 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 Prince William County during September?
Significant rainfall exceeding 181.7 mm is expected in Prince William County during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Prince William County during September?
The average wind speed in Prince William County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Prince William County
Explore the daily rainfall trends and prepare for Prince William Countys September weather 💧
Typically, Prince William County has 11 rainy days in September with a total of 181.7 mm of rainfall.
UV exposure in Prince William County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Prince William County
Select a location for an accurate weather forecast
More Locations Quick links
More Prince William County weather pages
You are here
Found a mistake?
We appreciate your attention to details. Tell us here.