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 8.4° 6.1°
Average change in low temperature day-to-day 10.0° 7.5°
Precipitation Last Month Last Year
Chance of dry day after a precip day 54% 56%
Chance of precip day after a dry day 47% 25%

Weather forecast accuracy for Herndon, Virginia

Last Month
MeteoGroup   69.44%
Foreca   68.06%
The Weather Channel   66.94%
Weather Underground   66.67%
AccuWeather   66.39%
World Weather Online   63.61%
Dark Sky (forecast.io)   59.17%
NWS Digital Forecast   57.23%
Persistence   32.44%
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

66.1% of NWS Digital Forecast's high temperature forecasts for Herndon were within 3 degrees of actual temperatures last year.