5-day weather forecast for Garrisonville, Virginia

Weather changeability for Herndon, Virginia

Temperature Last Month Last Year
Average change in high temperature day-to-day 4.5° 5.8°
Average change in low temperature day-to-day 5.5° 7.6°
Precipitation Last Month Last Year
Chance of dry day after a precip day 67% 60%
Chance of precip day after a dry day 25% 27%
 
 

Weather forecast accuracy for Herndon, Virginia

Last Month
AccuWeather   80.36%
The Weather Channel   76.79%
Weather Underground   75.60%
MeteoGroup   73.81%
WeatherBug   70.83%
Dark Sky (forecast.io)   70.24%
National Weather Service   69.94%
CustomWeather   69.64%
Foreca   69.64%
Persistence   44.87%
Last Year
MeteoGroup   76.15%
The Weather Channel   75.54%
AccuWeather   72.40%
Foreca   72.25%
National Weather Service   72.09%
Weather Underground   71.69%
WeatherBug   71.23%
CustomWeather   68.49%
Persistence   42.90%
 

ForecastAdvisor Fact

36.1% of Persistence's low temperature forecasts for Herndon were off by more than 10 degrees last year.