5-day weather forecast for Brandy Station, Virginia

Weather changeability for Herndon, Virginia

Temperature Last Month Last Year
Average change in high temperature day-to-day 7.1° 6.2°
Average change in low temperature day-to-day 6.2° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 59% 43%
Chance of precip day after a dry day 50% 34%

Weather forecast accuracy for Herndon, Virginia

Last Month
The Weather Channel   77.96%
Weather Underground   77.42%
Dark Sky   74.19%
AccuWeather   73.66%
MeteoGroup   73.66%
Foreca   71.77%
NWS Digital Forecast   69.09%
World Weather Online   54.30%
Persistence   39.25%
Last Year
The Weather Channel   79.46%
Weather Underground   79.11%
AccuWeather   78.89%
Foreca   77.80%
MeteoGroup   76.55%
NWS Digital Forecast   74.96%
Dark Sky   74.13%
World Weather Online   61.38%
Persistence   41.76%

ForecastAdvisor Fact

On average, The Weather Channel's high temperature forecasts for Herndon were off by 1.98 degrees last month.