During the hot, humid summer months, meteorologists often discuss the heat index instead of the actual air temperature. But how is the heat index calculated, and why is it more important than the air ...

Q: It always seems much more humid inside my air-conditioned house than it is outside. The humidity inside is about 35 percent while outside it can be 15 percent. Is that OK, and why does it happen? A ...

Not to be trite, but the air lately has been quite uncomfortable because of the amount of water in suspension. We often refer to this as “heavy” air because it is so dense. We will witness heavy ...

It plays a huge role in comfort, which is why knowing how to control humidity in your home is vital. Too much can leave rooms feeling stuffy or turning moldy, while too little can cause physical ...

Some hot days feel even worse thanks to high humidity, trapped heat and dew points. Cities are especially vulnerable. By Nazaneen Ghaffar Nazaneen Ghaffar is a reporter on The Times’s weather team. It ...