When the recreational cannabis law takes affect in January 2020 are out of state residents allowed to purchase? And I believe it said up to 15 grams legally allowed to be obtained/ in possession at once?

You might want to recheck that Residents Only answer. I know for a fact out of state people can have up to 15 grams legally in Illinois In January 2020. I have also never heard of a state that's legalized only allowing that state's residents to purchase weed. I could be wrong but I'd be shocked if I were.

If I don’t live in the state but I am visiting for a while can I still buy.

Yes. Anyone over 21 can purchase...

Yes you can

Can Kentucky residents order online and have it delivered?

I was just up there and could buy a little ar each stop... very expensive