During the winter the Tatla Lake valley is much colder than the surrounding plateau and valleys as the cold air sinks creating strong temperature inversions. The nearby weather station at Puntzi recorded a low of -52.8°C (-63°F) on December 29, 1968. During the winters chinook winds blow up the coastal valleys, but often pass over Tatla Lake leaving the community in a deep freeze. This occurs because the Tatla Lake drainage system flows east, while the neighbouring valleys flow west through the Coast Mountains.