Rank 2-6 candidate dates for an outdoor event by real historical weather odds. Rain, heat, frost, wind, and thunderstorm probabilities computed in code from 10 years of ERA5 archive data for each date, a deterministic 0-100 weather-favorability score, per-date risk verdicts, and a plain-language recommendation. The "which Saturday should we book?" call for weddings, festivals, and races — any location worldwide.

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