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 8.4° 6.2°
Average change in low temperature day-to-day 10.5° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 67% 63%
Chance of precip day after a dry day 39% 33%
 
 

Weather forecast accuracy for Herndon, Virginia

Last Month
AccuWeather   78.27%
The Weather Channel   77.38%
Weather Underground   76.79%
Foreca   76.79%
Dark Sky (forecast.io)   72.32%
MeteoGroup   71.13%
NWS Digital Forecast   67.56%
World Weather Online   55.95%
Persistence   36.52%
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

On average, NWS Digital Forecast's low temperature forecasts for Herndon were off by 3.36 degrees last year.