What to wear to BottleRock Napa Valley: Napa sits at 26°C (79°F) by day and 11°C (52°F) at night in May, on city park, with a low chance of rain. That means a light base with one warm layer you can carry, cushioned trainers or a low boot, and a bag small enough for the gate rules. The crowd leans elegant, wine and boho, so anything that survives the day reads as right.













