The tundra is located near the north and south poles. The rainfall is light there. In the summer the temperature is only average to 34(fahrenheit). The soil there is very poor so it is almost always frozen.
The temperate and deciduous forest has a variation of rainfall. The average summer temperature is around 75 (fahrenheit). The colors change in the autumn.
The rainfall is very low or very seasonal. The average summer temperature is 68 (fahrenheit). As the name says the dominant form of the planet life is grass.