Answer:
The 'Coldest Terrestrial Biome after the Tundra and permanent Ice Caps is the Taiga'. Temperatures here vary from -54°C to 30°C (-65°F to 86°F) throughout the whole year. The mean annual temperature generally varies from -5°C to 5°C, but there are Taiga areas in both eastern Siberia and interior Alaska-Yukon where the mean annual reaches down to -10°C.
Next Question: Which is the 'Largest Desert in the World'?
Previous Question: Which is the 'World's Largest Terrestrial Biome'?