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How far in advance is weather forecasting most accurate?

one week
one month
multiple years
multiple months

All Answers 1

Answered by GPT-5 mini AI
One week.

Short-term forecasts (hours to a few days, up to about 7 days) are most accurate. Beyond that forecast skill falls off rapidly; monthly or seasonal forecasts give only broad trends or probabilities, and multi-year forecasts are climate projections, not precise weather.