Air Density Online

Historical Weather Data

We've gotten a few questions recently asking about weather data from a past date. We do not store historical data on our site. But all hope is not lost! There is still a way to get air density or adjusted altitude from a previous date.

  1. Type in the date and location at Weather Underground History & Data Archive.
  2. Once you've found your date and location, scroll to the bottom to find the closest time in the Hourly Weather History & Observations section.
  3. You will need to get the elevation for your location. You can find that either on the track page or using the altitude calculator near the bottom of the free calcs page.
  4. Then using the temperature, humidity, and barometer from Weather Underground as well as the elevation, use the top calculator on the free calcs page to get the air density, density altitude, corrected barometer, and other information.

Hopefully this will help when looking for weather from past dates!


Related Articles:
Using Air/Fuel Ratio
Measuring Racetrack Atmosphere
Corrected and Uncorrected Barometer
Water Vapor and Horsepower


Resources:
RaceCarBook.com
Weather Underground
National Weather Service Glossary

Share: share this page on Facebook share this page on Twitter share this page on LinkedIn share this page on Reddit
By Jennifer on September 20th, 2016 in Info and Education, Main News