5-day weather forecast for Clifton, Virginia

Weather changeability for Herndon, Virginia

Temperature Last Month Last Year
Average change in high temperature day-to-day 3.5° 6.1°
Average change in low temperature day-to-day 5.4° 7.5°
Precipitation Last Month Last Year
Chance of dry day after a precip day 75% 56%
Chance of precip day after a dry day 26% 25%
 
 

Weather forecast accuracy for Herndon, Virginia

Last Month
The Weather Channel   84.95%
Weather Underground   84.68%
MeteoGroup   82.26%
AccuWeather   81.35%
Foreca   80.91%
Dark Sky (forecast.io)   74.46%
NWS Digital Forecast   72.85%
World Weather Online   59.17%
Persistence   49.19%
Last Year
MeteoGroup   75.10%
The Weather Channel   74.72%
Weather Underground   74.67%
Foreca   73.88%
AccuWeather   73.07%
Dark Sky (forecast.io)   72.01%
NWS Digital Forecast   67.01%
World Weather Online   61.88%
Persistence   44.51%
 

ForecastAdvisor Fact

83.9% of NWS Digital Forecast's high temperature forecasts for Herndon were within 3 degrees of actual temperatures last month.