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 4.1° 6.2°
Average change in low temperature day-to-day 5.6° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 63% 63%
Chance of precip day after a dry day 23% 33%
 
 

Weather forecast accuracy for Herndon, Virginia

Last Month
MeteoGroup   78.61%
Dark Sky (forecast.io)   77.22%
The Weather Channel   76.94%
Weather Underground   76.44%
AccuWeather   75.56%
Foreca   74.17%
NWS Digital Forecast   69.44%
World Weather Online   65.00%
Persistence   48.06%
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

20.0% of AccuWeather's low temperature forecasts for Herndon were exactly right last month.