What to wear to Montreux Jazz Festival: Montreux sits at 25°C (77°F) by day and 15°C (59°F) at night in July, on city streets, with a moderate 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 jazz, elegant and wine, so anything that survives the day reads as right.
Women's outfits at Montreux Jazz Festival have to clear the same three hurdles as everyone else's. 25°C (77°F) by day, 15°C (59°F) at night, city streets underfoot, with more options for solving them.
The dominant aesthetics at Montreux Jazz Festival are jazz, quiet elegance, wine-country and urban. That is the visual language of the site, the stages, the merch, the crowd photos, and outfits that speak it look intentional rather than borrowed.
There is no enforced dress code. What the crowd rewards is a look that survives 16 days of city streets without you having to protect it.
What people actually wear: one good layer over a light base, because the temperature halves after sunset; something identifiable, a colour, a hat, a flag, so your group can find you in a crowd of that size.