USA Temperature: can I sucker you?

I’m just back from a bit of a busman’s holiday in California, so US weather is on my mind. No anecdotes though – instead, here is an instructive example of the bad kind of data mining.

Open Mind

Suppose I wanted to convince people that temperature in the USA wasn’t going up, it was going down. What would I show? Let’s try yearly average temperature in the conterminous U.S., also known as the “lower 48 states” (I’ll just call it “USA”):

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About Jon Butterworth

UCL Physics prof, works on LHC, writes (books, Guardian Science and elsewhere). Citizen of England, UK, Europe & Nowhere, apparently.
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