Ethereum is unique in that it attempts to wield the blockchain as a way to correct what its designers believe is a problematic part of the internet’s design.
But if existing IT infrastructure featuring accounts and log-ins is not sufficient for the security of digital identity, then the problem might be solved by blockchain technology.
One contract would use outside data to determine the weather, and another contract could settle the bet based on the information it received from the first contract when the conditions are met.