What to wear to San Fermín: Pamplona sits at 27°C (81°F) by day and 14°C (57°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 costume, party and parade, so a full costume is the norm rather than the exception.
Men's festival dressing at San Fermín comes down to three decisions: how much you can take off when it hits 27°C (81°F), what you put back on at 14°C (57°F), and whether your shoes can take city streets for 9 days.
The short version: White head to toe with a red neckerchief and sash. Worn by essentially everyone, all nine days.
The dominant aesthetics at San Fermín are full costume, party and parade. 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.
This is a costume festival, and that changes the maths: turning up in normal clothes is the conspicuous choice. Budget for one full look rather than three half-hearted ones, and make sure you can walk, dance and queue in it for eight hours.
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.
