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 9.6° 6.2°
Average change in low temperature day-to-day 9.1° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 54% 43%
Chance of precip day after a dry day 47% 34%

Weather forecast accuracy for Herndon, Virginia

Last Month
AccuWeather   70.62%
The Weather Channel   68.18%
Weather Underground   67.88%
MeteoGroup   65.79%
Foreca   65.75%
World Weather Online   61.71%
NWS Digital Forecast   61.70%
Dark Sky   58.72%
Persistence   30.65%
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

1.2% of Persistence's low temperature forecasts for Herndon were exactly right last month.