What I wanted to say is to gradually increase the weather conditions when getting closer to a certain point. Lets say it is always raining at place A in the world. Then, the closer you are to place A, the darker you turn the clouds and eventually start and increase the rain. A world where you need different weather conditions should be huge by itself already, so it would only make sense to not “see” the border of the cloud rains. Same goes for other weather conditions.
I mean, just think about it, when you halt time and go to a place where it snows, then the snow does not start at a certain border. The weather changes gradually until eventually leading to downfalls of snowflakes. Manipulating the weather depending on the distance to a certain spot will most likely create the same illusion.