Proximity to the Pacific coast has a moderating effect on Teslin compared with the rest of the Yukon. Weather information over the past three decades shows that January temperatures in Teslin typically reach a maximum of minus 14.6 degrees Celsius in the daytime, dropping to minus 24 C at night. In July, daytime temperatures reach a maximum of 20.2 degrees C with overnight temperatures at 7.5 C. Total precipitation in any year is about 340 millimetres, with about 200 mm as rain and almost 150 cm as snow.
