There's a sandstorm in Esdham from 9/21-9/25, rain in Balicea from 9/29-9/30, rain in Aerilon/Downapolis from 9/21-9/30, rain in Aqures Ixen from 9/22-9/25 and 9/29-9/30 (or a backdated storm from 9/1-9/3), rain in Trano Golsaucia from 9/22-9/25 and a storm there on 9/28. Or we can wait until it gets colder if you'd rather wait for another month!

As for Akane, she's usually got her nose buried in files at the lab, so he can travel anywhere he likes. Or she can ask him to go somewhere and find some plant samples for her to use?