Science Fact Finder | Weather and Climate - How Accurate Are Forecasts?

How accurate are forecasts?

For most parts of the world, weather forecasts for 12 to 24 hours in advance are correct about 87 percent of the time; for 24 hours in advance they're correct about 80 percent of the time; and for 3 to 5 days in advance they're correct about 65 percent of the time (up from 55 percent in the mid-1980s).

Source: Christian, Spencer, and Tom Biracree. Spencer Christian's Weather Book, pp. 123-24.

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