This map from the Lamont-Doherty Earth Observatory shows the projected average precipitation over the next 50 years compared to the average precipitation over the last 50 years.

Projected Rainfall Changes

It’s going to get much dryer at the equator and wetter at the poles.

…nineteen different climate modeling groups around the world, using different climate models, show widespread agreement that Southwestern North America - and the subtropics in general - are on a trajectory to a climate even more arid than now.

I didn’t find a map, but the southern Europe/Mediterranean/Middle East region is also expected to dry significantly.

This graph from the original article in Science Magazine shows the results of all 19 models. This century is divided into five 20 year segments. Almost all of the predictions fall on the negative side of the line.