5-day weather forecast for Herndon, Virginia

Weather changeability for Herndon, Virginia

Temperature Last Month Last Year
Average change in high temperature day-to-day 3.6° 6.2°
Average change in low temperature day-to-day 7.2° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 71% 43%
Chance of precip day after a dry day 38% 34%

Weather forecast accuracy for Herndon, Virginia

Last Month
Dark Sky   77.98%
AccuWeather   75.89%
The Weather Channel   75.30%
Weather Underground   75.00%
Foreca   72.02%
NWS Digital Forecast   70.83%
MeteoGroup   68.75%
World Weather Online   60.71%
Persistence   40.28%
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

94.0% of The Weather Channel's high temperature forecasts for Herndon were within 3 degrees of actual temperatures last month.