🇫🇷 Clisson, France
Does It Rain at Hellfest?
Across roughly 15 years of records at the site, rain falls on about 100% of Hellfest days, averaging 2.4mm a day.
The short answer
100%
of days see 1mm+
2.4 mm
average per day
High
mud risk
Wet days are common enough that boots are a sensible default rather than an over-reaction, especially in the camping fields.
Rain day by day
| Day | Rain | High | Weather score |
|---|---|---|---|
| Thu 18 Jun | 3.8 mm | 23°C | 89% |
| Fri 19 Jun | 2.2 mm | 23°C | 94% |
| Sat 20 Jun | 1.3 mm | 23°C | 97% |
| Sun 21 Jun | 2.2 mm | 23°C | 94% |
The wettest festival day on average is Thu 18 Jun at 3.8mm; the driest is Sat 20 Jun at 1.3mm. Over the main days that adds up to roughly 9.5mm.
What rain actually does to Hellfest
Heat is now the dominant Hellfest weather story — the 2019 edition saw the temperature push 40°C and organisers had to add water points and shaded zones. The exposed site offers little natural shade, and a heavy black-clad dress code makes it worse. When storms do roll in, they tend to be short but intense, and the dusty fields turn slick fast.
If the forecast turns wet
- Boots over trainers, and a spare pair of shoes sealed in a bag.
- Rain jacket for walking, poncho for standing in a crowd with a backpack.
- Pitch on the high side of the field, never in a dip, and use a groundsheet.
- Dry bags for phone, power bank, tickets and one full change of clothes.
How we know
These numbers come from the Open-Meteo historical reanalysis at the festival's coordinates, averaged day by day over about 15 years. They describe a typical edition, not the one you're going to — for the live picture, the Hellfest forecast page updates twice a day once the event is inside the forecast window.