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 5.1° 6.2°
Average change in low temperature day-to-day 4.8° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 29% 63%
Chance of precip day after a dry day 10% 33%

Weather forecast accuracy for Herndon, Virginia

Last Month
Foreca   78.16%
Weather Underground   76.72%
The Weather Channel   76.44%
AccuWeather   74.14%
MeteoGroup   74.14%
Dark Sky (forecast.io)   72.49%
NWS Digital Forecast   68.68%
World Weather Online   66.95%
Persistence   55.06%
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

8.9% of Foreca's low temperature forecasts for Herndon were exactly right last year.