Have you ever wondered why meteorologists on TV focus on the dewpoint temperature and not relative humidity? Or, have you ...

Relative humidity is expressed as a percentage, whereas the dew point is expressed in degrees.

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

Checking the temperature reading during a heat wave won’t tell the whole sweltering story. It’s going to feel a lot hotter. Blame the heat index, also called “apparent temperature.” It’s a combination ...

Most people assume that temperature and relative humidity always move in opposite directions throughout the day: when the air warms up, it becomes drier, and vice versa. This common pattern makes the ...

Michigan's heat wave this week will feel even warmer because of high humidity. Here's how the heat index works.

Humidity is part of the answer. But Britain’s housing, long summer days, and lack of experience with extreme heat also make hot weather worse. The geography of the British Isles, surrounded by seas ...

Has Sydney felt more like Cairns lately? You’re not imagining it – millions of Australians up and down the east coast have sweltered through exceptionally high humidity in recent weeks. It’s due to ...