Why is the taiga colder than the tundra?
In much of the taiga, -20 °C (-4 °F) would be a typical winter day temperature and 18 °C (64 °F) an average summer day.
While in the tundra, a local climate in which at least one month has an average temperature high enough to melt snow ( 0 °C (32 °F ), but no month with an average temperature in excess of 10 °C (50 °F )
Looking at the temperatures, the tundra appears to be colder than the taiga.
The taiga has trees, more flora and fauna while the tundra has no trees at all. It is just too cold for woody tress to grow. Man usually doesn't live on the tundra.
When looking closer at the reason that the tundra sometimes has warmer days or months, it seems that the tundra is not divided into divisions and it is lumped together. There will be areas that are much warmer than others.
The tundra covers an area called the Artic tundra, Antarctic tundra and the Alpine tundra. The only thing that makes these three the same is the lack of trees and coldness. The Alpine (high mountain) tundra is cold because high altitude.
So this is the reason why the tundra sometimes has warmer temperatures than the taiga.