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
MeteoGroup   66.67%
Weather Underground   62.04%
NWS Digital Forecast   62.04%
The Weather Channel   61.11%
Foreca   61.11%
AccuWeather   61.11%
Dark Sky (forecast.io)   61.11%
World Weather Online   52.78%
Persistence   36.11%
Last Year
AccuWeather   75.78%
The Weather Channel   75.34%
Weather Underground   74.95%
MeteoGroup   73.23%
NWS Digital Forecast   71.27%
Dark Sky (forecast.io)   70.42%
Foreca   70.40%
World Weather Online   62.25%
Persistence   43.98%
 

ForecastAdvisor Fact

8.9% of Foreca's low temperature forecasts for Herndon were exactly right last year.