I believe you have already noticed that the climates in travel worlds such as China, Egypt and France do not have sound, such as rain. I've also looked and haven't found a mod that fixes this, but is there one out there?

WA predated the Seasons EP by a long while. Under EA standard, there is no weather in the WA destination worlds so I believe this means you are using a mod to make this happen. Might it be the most recent version of NRaas Traveler, which is supposed to fix things like this, or something else?

You're right, I use most all of nraas mods, including traveler and tempest. I didn't had associate the lack of raining sound being an addition from rain itself that EA did not included on vacation worlds :o