Electromagnetic Waves (Microwaves)- Does the effect of rain on a wave in point A impact it in point B
Roughly speaking anything between transmitter TX and A does not affect the signal from going from TX to B.

This is, however, not completely true:
There are two exceptions:


If the obstracle comes too close to the line of sight between TX and B it does affect signal propagation between TX and B even if it is well off the line of sight.
The "sensitive" volume between TX and B is called the Fresnel Zone.
If there is multi path propagation by reflection at the obstractle. It  may cause destructive interference at B.