ELI5: Explain Like I'm 5

Equivalent temperature

Have you ever heated up something in the microwave or on the stove? Sometimes you might use a thermometer to check how hot it is. The temperature is usually measured in degrees Celsius or Fahrenheit.

But what if we wanted to know how hot something would feel on our skin? That's where equivalent temperature comes in.

Equivalent temperature is a way of describing how hot something feels, instead of just its temperature. It takes into account not only the temperature, but also how humid the air is and how fast the wind is blowing.

If you've ever been outside on a really hot day, you know that it can feel hotter than the temperature on a thermometer. That's because the humidity and wind can affect how hot it feels. For example, if it's 30 degrees Celsius outside with no wind and low humidity, it might feel pretty comfortable. But if it's 30 degrees Celsius with high humidity and a strong wind, it might feel like you're standing in an oven.

Equivalent temperature takes all of these factors into account and gives us a number that tells us how hot something feels. So if you see that the equivalent temperature is 40 degrees Celsius, you know that it will feel very hot on your skin, even if the actual temperature is lower.