I can’t answer the question of whether you can reset the default weather setting, but for future reference, you do know once you make changes to a weather setup you can save that setup as a custom version which doesn’t affect the default configuration? You can keep those custom setups or delete them if you find you’re not using them.
If this is old news to you, please disregard!
Regards
P.S. if you do want to reset the defaults, I’m sure we can provide you the specifics of each one, and you can enter those and save them back as your defaults.