What to wear to Mighty Hoopla: London sits at 21°C (70°F) by day and 13°C (55°F) at night in June, on city park, 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 pop, glam and costume, so a full costume is the norm rather than the exception.
| Typical daytime high | 21°C (70°F) |
|---|---|
| Typical night low | 13°C (55°F) |
| Day–night swing | 8°C (14°F) |
| Rain risk | Moderate |
| Ground | Grass and gravel paths |
| Sun exposure | High, little natural shade |
Everything below follows from those numbers.