Weather Articles

Below is a chart showing frost dates in the spring and fall for various Canadian cities. (Also, see our frost dates for U.S. cities.) 

El Niño and La Niña are two faces of a large weather phenomenon. Here are a few questions and answers to help.

Sometimes there is a change in Earth's atmosphere or oceans that disrupts typical weather patterns. Here are descriptions of different weather events—teleconnections and oscillations—that can affect weather near the disruption and far from it.

Consult the Windchill Chart below to avoid severe cold—and frostbite.

As the wind speed increases, the air temperature against your body falls. The combination of cold temperature and high wind creates such a severe cooling effect that your flesh can actually freeze...

Its easy to tell when it's sticky outside: You have to peel yourself off vinyl car seats and plastic lawn furniture, and the laundry you hang on the line never seems to dry. Now you can get a more accurate measure of the mugginess, or relative humidity, by using the...

The Saffir-Simpson Hurricane Scale is a 1-5 rating based on the hurricane's present intensity.

At The Old Farmer's Almanac, readers often ask us about tornadoes. Here are the most common questions and answers about nature's most violent storms!

It's fun to play in the Sun but too much ultraviolet (UV) radiation can cause serious health effects.