What part of brazil often experiences long period drought

The southern and central parts of Brazil usually experience the driest, hottest climate in the country and can experience droughts that last more than three months out of every year.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.