Using this site – the future and the past
If you're a little unsure about how best to utilize the weather data provided on this site, you might get a lot out of a recent article we wrote for racingjunk.com: Air Density Tuning at MLRA Lucas Oil Speedway Oval Track, April 12-13, 2019 presented by RacingJunk.com This article highlights how to use parts of this site to prepare for a racing outing.
From there, you can get historical weather data and a 36 hour forecast of air density and density altitude on our site. Check out the US track weather and the International track weather to get more weather data.