🇧🇪 Dessel, Belgium
Is It Cold at Night at Graspop Metal Meeting?
Overnight lows average 14°C across the main days, based on roughly 15 years of records at the site.
The short answer
Yes — nights at Graspop get properly cool. A typical low is 14°C, and the coldest festival night averages around 13°C (Sun 21 Jun). The gap between a 22°C afternoon and that is what catches people out.
A 2-season bag with a comfort rating around 8°C covers these nights comfortably.
Night by night
| Night of | Low | High that day | Rain |
|---|---|---|---|
| Thu 18 Jun | 14°C | 23°C | 4.4 mm |
| Fri 19 Jun | 14°C | 22°C | 1.3 mm |
| Sat 20 Jun | 13°C | 21°C | 2.9 mm |
| Sun 21 Jun | 13°C | 21°C | 4.2 mm |
Long-run averages, not a forecast. Individual years swing several degrees either side.
Sleeping warm in a tent
- Insulate underneath first. A cheap foam mat under an air mattress does more than a warmer bag.
- Dry clothes to sleep in. Damp festival clothes will keep you cold all night.
- A beanie and dedicated sleep socks — the cheapest comfort upgrade in the bag.
- Eat something before bed and don't go to sleep dehydrated; both make you feel the cold more.
- A packable insulated jacket for the walk back from the last set and the 8am queue for coffee.
Why nights matter to the weather score
Our festival weather score treats overnight lows separately from daytime highs, because a warm afternoon doesn't make up for a night you can't sleep through. Nights between roughly 10 and 24°C count as comfortable camping weather; below that the score starts to drop, and it drops sharply once lows fall under about 8°C.