Summer is here, and heat and humidity have arrived.

Temperatures are skyrocketing for the third straight day across the Eastern US, but there’s at least three different ways to ...

That is because the dew point is a measure of how much water vapor is in the air and relative humidity is a measure of how much water vapor is in the air relative to how much water vapor could be in ...

Dew point and relative humidity are related, but dew point communicates how things feel much better. That’s why we use it as the basis for our Muggy Meter we show on TV and online. It’s an absolute ...

Much of the U.S. is under a blanket of oppressive heat as people prepare for a sweltering July 4th holiday. It’s during times like these that you often hear people talk about the “heat index” when ...

Thursday was the peak of this brutal heat wave, with heat index values topping 110 degrees in several Connecticut towns.

Today's heat index value in Ocala could approach 106 degrees, the National Weather Service reports. The story is similar ...

What to know about the situation from the National Weather Service.

This resource is suitable for weather topics for primary school learners. Have you ever felt hot and sweaty even when you haven't done any exercise? That might be because of humidity. But what is ...

Jacksonville and west-central Illinois face an extreme heat warning as heat index values reach 105 to 110 through Thursday.