What to wear to Green Man Festival: Crickhowell sits at 19°C (66°F) by day and 10°C (50°F) at night in August, on mountain, with a high chance of rain. That means a light base with one warm layer you can carry, waterproof boots, and a bag small enough for the gate rules. The crowd leans folk, cottagecore and boho, so anything that survives the day reads as right.
| Typical daytime high | 19°C (66°F) |
|---|---|
| Typical night low | 10°C (50°F) |
| Day–night swing | 9°C (16°F) |
| Rain risk | High |
| Ground | Uneven slopes and stone |
| Sun exposure | High during the day, no shade at the main stages |
Assume rain. A packable shell in your bag costs nothing to carry and saves the weekend; a "cute" jacket that soaks through ruins two days.
Everything below follows from those numbers.