There are many places in the world that could legitimately stake a claim to having the world's weirdest weather, as some days residents just never know what they're in store for.
Southern Alberta, in Canada, certainly qualifies as it definitely sees all four seasons, sometimes all in the same day. The area is famous for its chinooks, which bring warm winds that thaw out harsh winter days seemingly at random. But, to be fair, winters there are typically quite brutal, so even a modest relief would be welcome.
Southern Alberta's weird weather was on display once again recently, as a dry spring day brought widespread grass fires, only to be replaced by a sudden, awful return to wintry conditions.