In the first few weeks of spring, a 50-degree-Fahrenheit (10-degree-Celsius) day might call for a light jacket or no jacket—or even short sleeves, depending on the person. But in the fall ...

As extreme heat becomes more dangerous, Black Americans may be disproportionately affected. Wet bulb temperatures could have a significant impact.

April 1, 1975, was the day Canada gave Fahrenheit the boot and started using Celsius to measure temperature. April 1, 2025, ...