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 5.8° 7.5°
Precipitation Last Month Last Year
Chance of dry day after a precip day 80% 56%
Chance of precip day after a dry day 13% 25%

Weather forecast accuracy for Herndon, Virginia

Last Month
Weather Underground   82.47%
The Weather Channel   82.18%
Foreca   80.75%
MeteoGroup   80.46%
AccuWeather   76.72%
Dark Sky (forecast.io)   75.86%
World Weather Online   67.87%
NWS Digital Forecast   65.64%
Persistence   51.19%
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

56.3% of Dark Sky (forecast.io)'s low temperature forecasts for Herndon were within 3 degrees of actual temperatures last year.