5-day weather forecast for Garrisonville, Virginia

Weather changeability for Herndon, Virginia

Temperature Last Month Last Year
Average change in high temperature day-to-day 8.0° 6.1°
Average change in low temperature day-to-day 10.5° 7.5°
Precipitation Last Month Last Year
Chance of dry day after a precip day 70% 56%
Chance of precip day after a dry day 39% 25%

Weather forecast accuracy for Herndon, Virginia

Last Month
The Weather Channel   78.74%
Weather Underground   78.74%
MeteoGroup   74.14%
Foreca   73.81%
AccuWeather   72.70%
Dark Sky (forecast.io)   67.82%
NWS Digital Forecast   62.65%
World Weather Online   53.45%
Persistence   36.21%
Last Year
MeteoGroup   75.10%
The Weather Channel   74.72%
Weather Underground   74.67%
Foreca   73.88%
AccuWeather   73.07%
Dark Sky (forecast.io)   72.01%
NWS Digital Forecast   67.01%
World Weather Online   61.88%
Persistence   44.51%

ForecastAdvisor Fact

64.0% of Foreca's low temperature forecasts for Herndon were within 3 degrees of actual temperatures last year.