There's a thread for watermelons, this one is for cucumis melons - cantaloupes, honeydews and the like
Watermelons present one set of problems determining if they're ripe, while cucumis.. melons are in many cases [not honeydews, alas] easier in that regard - they turn color, and then you've got to pick them NOW
They are, however, quite prone to splitting - I gave up on Savor charentais for that reason and now grow hybrid varieties
Here in N IL, it can be hard to get melons ripe before the season winds down. I engage in all sorts of obsessive tactics to get melons in August, like trialling earlier varieties. This year, I've got several out there ripening, so naturally our July dry spell has ended in one flooding rain after the other. Now it's a race between ripening and splitting.
At least twice a day I go check the melons I think most likely to ripen first [a Galia type called Diplomat] Are you yellow yet?
At least that one I can see, because the vines of this variety aren't very vigorous for some reason this year. Next to it, a charentais hybrid has vines so thick it's impossible to find the fruit - made more difficult because I've netted the melon patch to deter the varmints, which have been raiding the garden a lot this year.
As soon as the Diplomat turns, I'll start checking the others more closely. Tomorrow it's August