Why Do I Still Sweat Even With the AC at 70 degrees (Video)

“Hi, my name is Greg Batista here to answer another question from the internet.

HotAndBothered asks: Why am I sweating when my AC is set to 70 degrees?

It’s not just about temperature — it’s about humidity. Air conditioners cool the air but may not always dehumidify enough, especially if the system is oversized or the fan runs continuously. In Florida, outdoor humidity often exceeds 70–80%, and if indoor humidity stays above 60%, people feel sticky even at 70°F. Engineers call this the “effective temperature,” where humidity makes it feel warmer than it is. Solutions include proper AC sizing, adding dehumidifiers, or adjusting fan settings. If you’re still sweating indoors, it’s probably a humidity problem, not just the thermostat.

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Authoritative references: ASHRAE Handbook – HVAC Applications; U.S. Department of Energy – Humidity Control Guidance.

The author, Greg Batista, PE, CGC, SI is owner of G. Batista Engineering & Construction and is a nationally-recognized engineer and contractor with more than 35 years of experience and offices in Fort Lauderdale, Florida.