5-day weather forecast for Manassas, Virginia

Weather changeability for Herndon, Virginia

Temperature Last Month Last Year
Average change in high temperature day-to-day 6.7° 5.8°
Average change in low temperature day-to-day 9.0° 7.6°
Precipitation Last Month Last Year
Chance of dry day after a precip day 50% 60%
Chance of precip day after a dry day 38% 27%
 
 

Weather forecast accuracy for Herndon, Virginia

Last Month
Foreca   74.40%
AccuWeather   72.62%
Dark Sky (forecast.io)   72.02%
Weather Underground   70.24%
The Weather Channel   69.94%
National Weather Service   69.94%
WeatherBug   68.15%
MeteoGroup   66.37%
CustomWeather   66.07%
Persistence   37.50%
Last Year
MeteoGroup   76.15%
The Weather Channel   75.54%
AccuWeather   72.40%
Foreca   72.25%
National Weather Service   72.09%
Weather Underground   71.69%
WeatherBug   71.23%
CustomWeather   68.49%
Persistence   42.90%
 

ForecastAdvisor Fact

2.8% of Weather Underground's low temperature forecasts for Herndon were off by more than 10 degrees last year.