This mod allows you to pray for a clear sky. It's not like the other "clear sky" mod in the game, because it doesn't give you a fixed time to pray. You can pray as often as you want.

It also doesn't require you to do anything else. You can just sit and wait for the fog to lift.

This mod is simple and easy to use. You just need to open the chat window, and you're ready to start. 

The first time I tried to install it, I got a warning that it can be a security risk, but it doesn't seem to be a problem.