Thirteen

NOTE: see the UPDATE at the end of the post.

Jeff Masters at Wunderblog (part of Weather Underground) reported that for the lower-48 states of the USA, every one of the last 13 months was in the top third of its historical distribution. He calculated the odds of that happening by random chance, in an unchanging climate, being only 1/3 to the 13th power, or a mere 1 chance out of about 1.6 million. Pretty small odds.

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