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 12.0° 5.8°
Average change in low temperature day-to-day 11.9° 7.6°
Precipitation Last Month Last Year
Chance of dry day after a precip day 56% 60%
Chance of precip day after a dry day 28% 27%
 
 

Weather forecast accuracy for Herndon, Virginia

Last Month
Weather Underground   78.45%
MeteoGroup   77.87%
National Weather Service   75.00%
Foreca   74.43%
The Weather Channel   74.43%
Dark Sky (forecast.io)   72.41%
AccuWeather   71.26%
WeatherBug   71.07%
CustomWeather   69.35%
Persistence   33.23%
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

2.3% of Weather Underground's high temperature forecasts for Herndon were off by more than 10 degrees last month.