(15 August 1891 – 13 June 1977) was a Swedish meteorologist who proposed a mechanism for the formation of precipitation in clouds.

In the 1930s, Bergeron and Walter Findeisen [fr] developed the concept that clouds contain both supercooled water and ice crystals.

Bergeron was one of the principal scientists in the Bergen School of Meteorology, which transformed this science by introducing a new conceptual foundation for understanding and predicting weather.

While developing innovative methods of forecasting, the Bergen scientists established the notion of weather fronts and elaborated a new model of extratropical cyclones that accounted for their birth, growth, and decay.

Bergeron is credited with discovering the occlusion process, which marks the final stage in the life cycle of an extratropical cyclone.