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Weather forecast in Loudoun County, United States

Loudoun County, current weather: partly cloudy, no precipitation is expected for the next 2 hours. Air temperature +21°, feels like +24°. Wind speed 1.5 Meters per second, northerly. Pressure 753 millimeters of mercury. Humidity 100%. Daytime water temperature +21°. Sunrise 06:55, Sunset 19:12. This time yesterday +20°

What type of warnings are you interested in?

Weather forecast for tomorrow: light rain · +19⁠…⁠+25⁠° · light winds at 1⁠–⁠2 m⁠/⁠s

Weather forecast for today: light rain will end around 8:00 · +19⁠…⁠+25⁠° · light winds at 1⁠–⁠2 m⁠/⁠s

Weather forecast for the week: rain · +22⁠…⁠+28⁠° · light winds at 2 m⁠/⁠s with gusts up to 7 m⁠/⁠s

Weather forecast for the weekend: light rain · +22⁠…⁠+28⁠° · light winds at 2 m⁠/⁠s with gusts up to 7 m⁠/⁠s

Wind speed 1.5 Meters per second, northerly, Light. Humidity 100%, High. Pressure 753 millimeters of mercury, Normal

Data sources

Click to view information from weather data sources

Hourly forecast.

  • 2 am: +21°, overcast, Feels like +24°.

  • 3 am: +21°, overcast, Feels like +23°.

  • 4 am: +20°, overcast, Feels like +22°.

  • 5 am: +19°, light rain, Feels like +21°. Probability of precipitation 50%

  • 6 am: +19°, light rain, Feels like +21°. Probability of precipitation 50%

  • Sunrise 19 September 06:55 am

  • 7 am: +19°, light rain, Feels like +21°. Probability of precipitation 40%

  • 8 am: +20°, overcast, Feels like +22°. Probability of precipitation 10%

  • 9 am: +20°, overcast, Feels like +21°. Probability of precipitation 10%

  • 10 am: +21°, overcast, Feels like +22°. Probability of precipitation 10%

  • 11 am: +22°, overcast, Feels like +24°. Probability of precipitation 10%

  • 12 pm: +24°, overcast, Feels like +27°.

  • 1 pm: +24°, overcast, Feels like +27°.

  • 2 pm: +25°, overcast, Feels like +28°.

  • 3 pm: +25°, overcast, Feels like +27°.

  • 4 pm: +25°, partly cloudy, Feels like +27°.

  • 5 pm: +25°, partly cloudy, Feels like +27°.

  • 6 pm: +24°, overcast, Feels like +26°. Probability of precipitation 10%

  • 7 pm: +23°, overcast, Feels like +25°. Probability of precipitation 10%

  • Sunset 19 September 07:12 pm

  • 8 pm: +22°, overcast, Feels like +25°. Probability of precipitation 10%

  • 9 pm: +20°, mostly clear, Feels like +22°. Probability of precipitation 10%

  • 10 pm: +20°, mostly clear, Feels like +22°. Probability of precipitation 10%

  • 11 pm: +19°, mostly clear, Feels like +21°. Probability of precipitation 10%

  • Friday, 12 am: +18°, mostly clear, Feels like +20°. Probability of precipitation 10%

  • 1 am: +17°, mostly clear, Feels like +18°. Probability of precipitation 10%

  • 2 am: +17°, mostly clear, Feels like +18°. Probability of precipitation 10%

  • 3 am: +17°, mostly clear, Feels like +18°. Probability of precipitation 10%

  • 4 am: +16°, mostly clear, Feels like +17°. Probability of precipitation 10%

  • 5 am: +16°, mostly clear, Feels like +17°. Probability of precipitation 10%

  • 6 am: +16°, mostly clear, Feels like +17°. Probability of precipitation 10%

  • Sunrise 20 September 06:55 am

  • 7 am: +16°, mostly clear, Feels like +17°. Probability of precipitation 10%

  • 8 am: +19°, clear, Feels like +21°. Probability of precipitation 10%

  • 9 am: +22°, clear, Feels like +24°. Probability of precipitation 10%

  • 10 am: +24°, clear, Feels like +26°.

  • 11 am: +25°, clear, Feels like +27°.

  • 12 pm: +27°, clear, Feels like +29°.

  • 1 pm: +28°, clear, Feels like +31°.

  • 2 pm: +28°, clear, Feels like +30°.

  • 3 pm: +28°, clear, Feels like +30°.

  • 4 pm: +28°, mostly clear, Feels like +29°.

  • 5 pm: +28°, mostly clear, Feels like +29°.

  • 6 pm: +26°, mostly clear, Feels like +27°.

  • 7 pm: +24°, mostly clear, Feels like +26°.

  • Sunset 20 September 07:10 pm

  • 8 pm: +22°, mostly clear, Feels like +24°.

  • 9 pm: +20°, mostly clear, Feels like +22°. Probability of precipitation 10%

  • 10 pm: +19°, mostly clear, Feels like +20°. Probability of precipitation 10%

  • 11 pm: +19°, mostly clear, Feels like +20°. Probability of precipitation 10%

Air quality forecast

Moderate

Air quality is acceptable. Enjoy your usual outdoor activities.

  • AQI — 54
  • AQI — 57
  • AQI — 56
  • AQI — 54
  • AQI — 54
  • AQI — 54
  • AQI — 44
  • AQI — 39

Weather forecast for Today, 19 September: in the morning air temperature +20°, feels like +22°, light rain, wind speed 2.2 meters per second, northerly, humidity 90%, pressure 753 millimeters of mercury; in the afternoon +25°, feels like +28°, overcast, wind speed 2.2 meters per second, northerly, humidity 70%, pressure 751 millimeters of mercury; in the evening +22°, feels like +24°, partly cloudy, wind speed 1.3 meters per second, north-westerly, humidity 80%, pressure 751 millimeters of mercury; in the night +18°, feels like +19°, mostly clear, wind speed 1.1 meters per second, north-westerly, humidity 91%, pressure 751 millimeters of mercury; uv index: 3, moderate; magnetic field: quiet; daytime water temperature +21°; sunrise 06:55; sunset 19:12; daylight hours: 12 hr 17 min

Weather forecast for Tomorrow, 20 September: in the morning air temperature +20°, feels like +22°, clear, wind speed 2 meters per second, northerly, humidity 82%, pressure 752 millimeters of mercury; in the afternoon +28°, feels like +30°, clear, wind speed 2 meters per second, easterly, humidity 50%, pressure 752 millimeters of mercury; in the evening +23°, feels like +24°, mostly clear, wind speed 1.2 meters per second, south-easterly, humidity 69%, pressure 752 millimeters of mercury; in the night +18°, feels like +19°, clear, wind speed 1.3 meters per second, south-easterly, humidity 91%, pressure 753 millimeters of mercury; uv index: 6, high; magnetic field: quiet; daytime water temperature +21°; sunrise 06:55; sunset 19:10; daylight hours: 12 hr 15 min

Weather forecast for Saturday, 21 September: in the morning air temperature +20°, feels like +22°, mostly clear, wind speed 2.2 meters per second, southerly, humidity 88%, pressure 754 millimeters of mercury; in the afternoon +27°, feels like +30°, partly cloudy, wind speed 2.5 meters per second, southerly, humidity 59%, pressure 752 millimeters of mercury; in the evening +24°, feels like +26°, partly cloudy, wind speed 1.8 meters per second, south-easterly, humidity 75%, pressure 752 millimeters of mercury; in the night +20°, feels like +21°, thunderstorm with rain, wind speed 2.2 meters per second, easterly, humidity 91%, pressure 753 millimeters of mercury; uv index: 6, high; magnetic field: quiet; daytime water temperature +20°; sunrise 06:56; sunset 19:09; daylight hours: 12 hr 13 min

Weather forecast for Sunday, 22 September: in the morning air temperature +19°, feels like +20°, light rain, wind speed 2.7 meters per second, easterly, humidity 91%, pressure 755 millimeters of mercury; in the afternoon +22°, feels like +23°, overcast, wind speed 2.7 meters per second, easterly, humidity 76%, pressure 755 millimeters of mercury; in the evening +20°, feels like +21°, partly cloudy, wind speed 1.8 meters per second, easterly, humidity 84%, pressure 754 millimeters of mercury; in the night +17°, feels like +17°, partly cloudy, wind speed 2.2 meters per second, south-easterly, humidity 85%, pressure 755 millimeters of mercury; uv index: 2, low; daytime water temperature +20°; sunrise 06:57; sunset 19:07; daylight hours: 12 hr 10 min

Weather forecast for Monday, 23 September: in the morning air temperature +18°, feels like +17°, overcast, wind speed 3 meters per second, easterly, humidity 81%, pressure 756 millimeters of mercury; in the afternoon +21°, feels like +21°, partly cloudy, wind speed 3 meters per second, south-easterly, humidity 71%, pressure 755 millimeters of mercury; in the evening +18°, feels like +18°, overcast, wind speed 2.2 meters per second, south-easterly, humidity 80%, pressure 755 millimeters of mercury; in the night +16°, feels like +16°, partly cloudy, wind speed 2.4 meters per second, south-easterly, humidity 88%, pressure 756 millimeters of mercury; uv index: 0, low; daytime water temperature +19°; sunrise 06:58; sunset 19:06; daylight hours: 12 hr 8 min

Weather forecast for Tuesday, 24 September: in the morning air temperature +19°, feels like +19°, overcast, wind speed 2.5 meters per second, easterly, humidity 84%, pressure 757 millimeters of mercury; in the afternoon +22°, feels like +22°, overcast, wind speed 3 meters per second, south-easterly, humidity 69%, pressure 756 millimeters of mercury; in the evening +19°, feels like +19°, overcast, wind speed 2.5 meters per second, south-easterly, humidity 79%, pressure 757 millimeters of mercury; in the night +18°, feels like +18°, overcast, wind speed 2.5 meters per second, south-easterly, humidity 85%, pressure 757 millimeters of mercury; daytime water temperature +18°; sunrise 06:59; sunset 19:04; daylight hours: 12 hr 5 min

Weather forecast for Wednesday, 25 September: in the morning air temperature +20°, feels like +20°, overcast, wind speed 3.2 meters per second, south-easterly, humidity 82%, pressure 758 millimeters of mercury; in the afternoon +24°, feels like +24°, overcast, wind speed 3.5 meters per second, southerly, humidity 69%, pressure 758 millimeters of mercury; in the evening +20°, feels like +20°, overcast, wind speed 2.7 meters per second, south-easterly, humidity 73%, pressure 757 millimeters of mercury; in the night +18°, feels like +18°, light rain, wind speed 2.7 meters per second, south-easterly, humidity 85%, pressure 757 millimeters of mercury; daytime water temperature +18°; sunrise 07:00; sunset 19:02; daylight hours: 12 hr 2 min

Weather forecast for Thursday, 26 September: in the morning air temperature +19°, feels like +19°, light rain, wind speed 3 meters per second, southerly, humidity 85%, pressure 757 millimeters of mercury; in the afternoon +24°, feels like +24°, light rain, wind speed 3 meters per second, south-westerly, humidity 65%, pressure 756 millimeters of mercury; in the evening +21°, feels like +22°, light rain, wind speed 2.4 meters per second, easterly, humidity 77%, pressure 755 millimeters of mercury; in the night +18°, feels like +18°, light rain, wind speed 2.2 meters per second, easterly, humidity 85%, pressure 755 millimeters of mercury; daytime water temperature +19°; sunrise 07:01; sunset 19:01; daylight hours: 12 hr 0 min

Weather forecast for Friday, 27 September: in the morning air temperature +20°, feels like +19°, light rain, wind speed 4.1 meters per second, easterly, humidity 77%, pressure 755 millimeters of mercury; in the afternoon +24°, feels like +22°, light rain, wind speed 6 meters per second, south-easterly, humidity 63%, pressure 753 millimeters of mercury; in the evening +20°, feels like +20°, overcast, wind speed 3 meters per second, southerly, humidity 76%, pressure 752 millimeters of mercury; in the night +16°, feels like +15°, partly cloudy, wind speed 3 meters per second, south-westerly, humidity 84%, pressure 753 millimeters of mercury; daytime water temperature +19°; sunrise 07:02; sunset 18:59; daylight hours: 11 hr 57 min

Weather forecast for Saturday, 28 September: in the morning air temperature +19°, feels like +19°, partly cloudy, wind speed 2.9 meters per second, south-westerly, humidity 77%, pressure 755 millimeters of mercury; in the afternoon +25°, feels like +24°, partly cloudy, wind speed 3.5 meters per second, easterly, humidity 57%, pressure 755 millimeters of mercury; in the evening +20°, feels like +20°, partly cloudy, wind speed 2.2 meters per second, south-easterly, humidity 73%, pressure 754 millimeters of mercury; in the night +17°, feels like +17°, mostly clear, wind speed 2.2 meters per second, south-easterly, humidity 82%, pressure 754 millimeters of mercury; daytime water temperature +19°; sunrise 07:03; sunset 18:57; daylight hours: 11 hr 54 min

Weather in Loudoun County — FAQ

What is the weather today in Loudoun County?

The weather in Loudoun County today: light rain, with an air temperature of +22°.

What will the weather in Loudoun County be like tomorrow?

The weather in Loudoun County tomorrow: mostly clear, with an air temperature of +24°.

What is the usual weather in Loudoun County in September?

In September, the weather in Loudoun County is usually partly cloudy, with an average air temperature of +24°.

What is the air pollution level in Loudoun County right now?

The air pollution level in Loudoun County is currently low, measuring 54.

What is the coldest month in Loudoun County?

The coldest month in Loudoun County is January, with an average air temperature of +4°.

What is the hottest month in Loudoun County?

The hottest month in Loudoun County is July, with an average air temperature of +29°.