Winter 2024. The seasons are defined as spring (march, april, may), summer (june, july, august), autumn (september, october, november) and winter (december, january, february). When do the four seasons start in 2024—for spring, summer, fall, and winter?

A look at the very latest winter 2024/2025 forecast data shows the growing influence of a weak la niña phase. This winter, la niña, which refers to the periodic cooling of ocean surface.