What to wear to Ceremonia: Mexico City sits at 27°C (81°F) by day and 12°C (54°F) at night in April, on city streets, 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 indie, y2k and streetwear, so anything that survives the day reads as right.
Women's outfits at Ceremonia have to clear the same three hurdles as everyone else's. 27°C (81°F) by day, 12°C (54°F) at night, city streets underfoot, with more options for solving them.
The dominant aesthetics at Ceremonia are indie, Y2K revival, streetwear and high glam. 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 2 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.