Why Your Altimeter Lies in Hot Weather (and why it matters on an IFR approach)

Check out IFR Ground School at https://bit.ly/4eyHHwD Ever noticed your GPS altitude doesn’t match your altimeter reading in hot weather? In this video, we break down why that happens — and why it can have real consequences during IFR approaches. We’ll fly a Cessna 172 at 4,500 feet on a warm day and explain how temperature affects pressure altitude, true altitude, and your indicated altitude. You’ll learn: Why your altimeter under-reads in warmer-than-standard temps How this impacts true vs. indicated altitude at various altitudes Why it really matters when intercepting a glideslope on an approach like the RNAV 11 into Redmond, Oregon This is the kind of nuance most ground schools skip — but not FlightInsight.