Pablo, according to many worlds, even if it is now raining in Oxford, yesterday “it will rain in Oxford tomorrow” and “it will not rain in Oxford tomorrow” were both equally true, or both equally false, or whatever. In any case, according to many worlds, there is no such thing as “what will happen”, if this is meant to pick some particular possibility like rain in Oxford.
Pablo, according to many worlds, even if it is now raining in Oxford, yesterday “it will rain in Oxford tomorrow” and “it will not rain in Oxford tomorrow” were both equally true, or both equally false, or whatever. In any case, according to many worlds, there is no such thing as “what will happen”, if this is meant to pick some particular possibility like rain in Oxford.