The biome that has little rainfall and high daytime temperatures is the desert.

Here's why:

* Low Rainfall: Deserts are characterized by receiving less than 10 inches of rainfall per year. This makes water a scarce resource, leading to the unique adaptations of desert plants and animals.

* High Daytime Temperatures: Deserts experience intense solar radiation, leading to scorching daytime temperatures that can often exceed 100°F (38°C). The lack of cloud cover and moisture contributes to these high temperatures.

Let me know if you'd like to learn more about deserts!