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
Foreca   74.00%
The Weather Channel   72.70%
Weather Underground   72.13%
MeteoGroup   67.82%
Dark Sky (forecast.io)   67.53%
NWS Digital Forecast   66.67%
AccuWeather   66.38%
Last Year
MeteoGroup   73.65%
Weather Underground   73.48%
The Weather Channel   73.30%
AccuWeather   71.69%
Foreca   71.26%
WeatherBug   70.41%
NWS Digital Forecast   70.03%
CustomWeather   68.27%
Persistence   41.15%

ForecastAdvisor Fact

14.1% of Foreca's high temperature forecasts for Herndon were exactly right last month.