5-day weather forecast for Manassas, Virginia

Weather changeability for Herndon, Virginia

Unfortunately, there was not enough data for this station to provide meaningful weather changeability data.

Weather forecast accuracy for Herndon, Virginia

Last Month
AccuWeather   69.55%
Weather Underground   68.27%
The Weather Channel   67.63%
National Weather Service   66.99%
MeteoGroup   66.99%
CustomWeather   64.10%
Foreca   63.78%
Dark Sky (forecast.io)   57.37%
Persistence   33.33%
Last Year
MeteoGroup   73.65%
Weather Underground   73.48%
The Weather Channel   73.30%
AccuWeather   71.69%
National Weather Service   71.45%
Foreca   71.26%
WeatherBug   70.41%
CustomWeather   68.27%
Persistence   41.15%

ForecastAdvisor Fact

On average, CustomWeather's high temperature forecasts for Herndon were off by 3.47 degrees last month.