Most every American has some basis to complain about unpredictable weather. As a mid-latitude country with shining seas and majestic mountain ranges and fruited, wind-swept plains, we’re subject to pretty much every type of weather meteorologists have thought to identify. So perhaps you’ve heard the line: “If you don’t like the weather in Chicago, wait five minutes.” Or you’ve heard it applied to a city nearer to you: Denver or San Francisco orAtlanta or Boston.
But where in the country is the weather truly the most unpredictable?
We’re going to answer this question in a specific way, by comparing daily weather patterns against long-term averages.1 We’ll define the weather as being more unpredictable when it deviates more from these long-term trends.
Meteorologists call these long-term averages climatology. Weather forecasting has moved beyond climatology to embrace more sophisticated…
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