ELi5: How Can It be 70F one day and 35F the next in the middle of winter

Question

I live in the South US, What’s happening that it’s 30F on Monday but Tuesday it’s 70F again.

In: Earth Science

Answer 1

Warm air mass moves in and cloud cover partially insulates the ground against heat loss. The next day, cold dry air from the north and a clear night-time sky loses a lot of heat.