La Nina is the cool phase of the El Nino-Southern Oscillation, a naturally occurring global climate pattern that involves changes in wind and ocean temperatures in the Pacific and can cause extreme weather across the planet.

In general, La Niña brings colder than normal temperatures across western Europe. Forecasters are expecting that temperatures will drop on the continent as we head towards November and December.

There is a 60 percent chance that a La Niña event may develop this year, which could last until March 2025. La Niña is part of a climate cycle that causes extreme weather shifts across the world, with its effects varying from place to place.