Weather is a business risk, not bad luck.
Heat sells cold drinks. A cool, overcast day at the same event can cut your sales hard, with the same fee and the same prep.
So plan for it: check the forecast before you commit inventory, keep perishable prep flexible, and expect roughly one washout per season.
Know the organizer's cancellation and refund policy before you pay the fee. Some refund, most don't.
Build the bad day into your season, not into your surprise.
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