Most people start to feel humidity is uncomfortable when relative humidity climbs above about 60% or when the dew point is above about 60–65°F (around 16–18°C). Very dry air below about 30% humidity can also feel uncomfortable in a different way (dry skin, nose, throat).

Quick Scoop

Key comfort ranges

  • Comfortable indoor humidity: roughly 30–50% relative humidity.
  • Starts to feel sticky/muggy: above about 60% relative humidity for most people.
  • Clearly high and problematic indoors: above about 60%, with mold and dust mites thriving around and above 70%.
  • Too dry/uncomfortable: below about 30% relative humidity, especially in heated indoor winter air.

Dew point “feel”

  • Dew point under ~55°F: usually feels comfortable.
  • Around 60°F: starts to feel humid or “sticky” for many people.
  • 65–70°F and higher: air often feels oppressive and very muggy.

Simple rule of thumb

  • If RH is over 60% or the dew point is over about 60–65°F, most people would call the humidity uncomfortable, especially if it’s warm at the same time.

TL;DR: Aim for about 30–50% humidity indoors; above 60% usually feels too muggy, and below 30% feels too dry.

Information gathered from public forums or data available on the internet and portrayed here.