What to wear to Junction 2: London sits at 21°C (70°F) by day and 13°C (55°F) at night in June, on industrial site, 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 techno, underground and warehouse, so black and functional reads as insider.
Women's outfits at Junction 2 have to clear the same three hurdles as everyone else's. 21°C (70°F) by day, 13°C (55°F) at night, industrial site underfoot, with more options for solving them.
The dominant aesthetics at Junction 2 are techno black, underground, warehouse and industrial. 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 function-first crowd. Black, utility and good shoes read as insider; heavy glitter and fancy dress read as tourist. Nobody is stopping you, but you will feel it.
What people actually wear: one good layer over a light base, because the temperature halves after sunset.