Whether a summer day is great or awful often comes down to the humidity.

The first major heat wave of summer has enveloped much of the midwestern and eastern U.S. in a brutal “dome” of record temperatures and high humidity. The dome phenomenon happens when weather ...

Humidity, a measure of the amount of water vapour in the air, plays a crucial role in shaping our weather, influencing rainfall, and affecting how we feel day to day. While often overshadowed by ...

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 ...

Extreme levels of heat and humidity are forecast to spread across the country over the next two weeks, blanketing the Southwest, Midwest, and East Coast with high temperatures beginning this June 19 ...

Extreme humidity and triple-digit temperatures are expected to affect millions of people across the United States. A sunbather rests in a chair in a park in Sutton Place, New York in 2013. This summer ...