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 6.2° 6.2°
Average change in low temperature day-to-day 10.2° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 60% 63%
Chance of precip day after a dry day 16% 33%

Weather forecast accuracy for Herndon, Virginia

Last Month
MeteoGroup   72.50%
AccuWeather   72.22%
Weather Underground   71.55%
Dark Sky (forecast.io)   71.11%
The Weather Channel   70.28%
Foreca   69.44%
NWS Digital Forecast   64.33%
World Weather Online   63.06%
Persistence   48.06%
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

1.1% of Foreca's low temperature forecasts for Herndon were off by more than 10 degrees last month.