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 9.0° 6.1°
Average change in low temperature day-to-day 13.9° 7.5°
Precipitation Last Month Last Year
Chance of dry day after a precip day 100% 56%
Chance of precip day after a dry day 16% 25%

Weather forecast accuracy for Herndon, Virginia

Last Month
MeteoGroup   72.84%
Weather Underground   70.99%
AccuWeather   70.68%
The Weather Channel   70.68%
Foreca   70.19%
Dark Sky (forecast.io)   63.89%
World Weather Online   62.65%
NWS Digital Forecast   60.66%
Persistence   46.73%
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

On average, The Weather Channel's low temperature forecasts for Herndon were off by 3.88 degrees last month.