About how far ahead is it theoretically impossible to make useful daily predictions?

About two weeks.

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  1. About two weeks ✔
  2. About two hours
  3. About two years

Why: It is theoretically impossible to make useful day-to-day predictions more than about two weeks ahead.

Huh, didn't know that: It is theoretically impossible to make useful day-to-day predictions more than about two weeks ahead.

The dad joke
Two weeks is the forecast's expiration date.
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References

Answer: About two weeks. It is theoretically impossible to make useful day-to-day predictions more than about two weeks ahead.

  1. Weather en.wikipedia.org/wiki/Weather
    more than about two weeks ahead
    Checked 2026-11-07.

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