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 6.1° 6.2°
Average change in low temperature day-to-day 9.3° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 86% 63%
Chance of precip day after a dry day 26% 33%

Weather forecast accuracy for Herndon, Virginia

Last Month
Foreca   84.52%
The Weather Channel   84.23%
Weather Underground   84.23%
Dark Sky (forecast.io)   82.21%
MeteoGroup   80.36%
AccuWeather   80.06%
NWS Digital Forecast   75.00%
World Weather Online   69.75%
Persistence   45.47%
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

It rained or snowed 88% of the time in Herndon last month when Dark Sky (forecast.io)'s text forecasts called for precipitation, and 5% of the time when they did not.