5-day weather forecast for Manassas, Virginia

Weather changeability for Herndon, Virginia

Temperature Last Month Last Year
Average change in high temperature day-to-day 3.4° 6.2°
Average change in low temperature day-to-day 4.1° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 50% 63%
Chance of precip day after a dry day 29% 33%

Weather forecast accuracy for Herndon, Virginia

Last Month
MeteoGroup   71.94%
Dark Sky (forecast.io)   71.67%
The Weather Channel   71.11%
Weather Underground   70.11%
AccuWeather   68.89%
Foreca   65.00%
NWS Digital Forecast   64.37%
World Weather Online   60.56%
Persistence   49.14%
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

0.0% of MeteoGroup's low temperature forecasts for Herndon were off by more than 10 degrees last month.