Quick answer: what temperature sleeping bag do I need for UK festivals?
A sleeping bag with a comfort rating of 5°C or lower covers the full UK festival season safely. UK summer festival nights regularly drop to 7–10°C after midnight — even in July. A summer bag rated to 10°C comfort will leave most people cold. A 3-season bag rated to 5°C is the correct minimum. If you run cold, go lower: a 0°C comfort bag gives you margin for bad years and cold snaps without overheating in warm years.
Sleeping bag temperature ratings confuse a lot of people — particularly the difference between “comfort”, “lower limit”, and “extreme” ratings, and how these relate to real UK festival conditions. This guide explains it clearly.
For specific product picks at every budget, see our best festival sleeping bags UK guide.
How sleeping bag temperature ratings work
Quick answer: what is the difference between comfort rating and lower limit on a sleeping bag?
EU standard EN 13537 gives sleeping bags three ratings: comfort (temperature at which a standard woman sleeps comfortably), lower limit (temperature at which a standard man sleeps comfortably), and extreme (survival temperature — not comfortable). Always use the comfort rating for festivals — the lower limit is for men who run warm, and the extreme rating is not a comfort measure at all. A bag with a 5°C comfort / -10°C extreme rating is a 5°C bag for most people.
| Rating type | What it means | Use for festival planning? |
|---|---|---|
| Comfort rating | Temperature a standard woman sleeps comfortably — the conservative rating | ✅ Yes — use this one |
| Lower limit | Temperature a standard man sleeps comfortably — warmer sleepers | ⚠️ Only if you run consistently warm |
| Extreme rating | Survival temperature — not a comfort measure | ❌ Ignore for festival use |
UK festival night temperatures by event
Quick answer: how cold does it get at night at UK festivals?
Consistently colder than most people expect. Late June at Glastonbury averages 7–12°C overnight minimum. Early June at Download is similar. August Reading/Leeds: 8–13°C. July Latitude and Green Man: 9–13°C. Wind chill on exposed sites (Glastonbury’s Worthy Farm, Green Man’s hillside) makes it feel 2–4°C colder. A 5°C comfort bag covers most years safely. A 0°C comfort bag covers all likely scenarios.
| Festival | Month | Typical overnight low | Minimum bag rating |
|---|---|---|---|
| Glastonbury | Late June | 7–12°C | 5°C comfort |
| Download | Early June | 7–11°C | 5°C comfort |
| Reading / Leeds | Late August | 8–13°C | 5°C comfort |
| Latitude | Late July | 9–13°C | 5°C comfort |
| Green Man | Late August | 8–12°C (exposed hillside) | 5°C comfort |
| End of the Road | Late August | 9–13°C | 5°C comfort |
Choosing the right rating for how you sleep
Quick answer: should I get a 5°C or 0°C sleeping bag for festivals?
5°C comfort for most people. 0°C comfort if you run cold, sleep restlessly, or want margin for bad years. The difference in pack size and price between a 5°C and 0°C bag is minimal at the budget level. The difference in warmth on a cold Glastonbury night is significant. If you are unsure, buy the 0°C bag — you can always unzip it if you are too warm. You cannot add warmth you do not have.
| Your situation | Recommended rating | Bag to consider |
|---|---|---|
| Average sleeper, UK summer festivals | 5°C comfort | Highlander Hawk 300 |
| Run cold, female sleeper | 0°C comfort | Vango Nitestar Alpha 250 |
| Run warm, male sleeper | 5°C lower limit (= warmer bag) | Alpkit Pipedream 250 |
| Spring festival (May/early June) | 0°C comfort minimum | Snugpak Softie 9 |
| Autumn festival (September+) | 0°C to -5°C comfort | Rab Ascent 300 |
How to add warmth without buying a new bag
If your existing bag is borderline, three affordable additions extend its warmth significantly:
- Sleeping bag liner — adds 3–8°C. The cheapest and most effective warmth upgrade available
- Thermal base layer — sleeping in thermals adds meaningful warmth without bulk
- Sleeping mat — without one, cold conducts straight up from the ground defeating your bag’s rating entirely. Non-negotiable
Related reading
- 🛏️ Best Festival Sleeping Bags UK
- 💰 Best Festival Sleeping Bag Under £50
- 🛏️ Mummy Bag vs Envelope Bag for Festivals
- 😴 How to Sleep at a Festival
- 🏕️ What Sleeping Bag for Glastonbury?
Frequently asked questions
What temperature rating sleeping bag do I need for a UK festival?
A comfort rating of 5°C or lower covers the full UK festival season safely. UK summer festival nights regularly drop to 7–10°C after midnight. A 0°C comfort bag gives you extra margin for cold years.
What is the difference between comfort and lower limit on a sleeping bag?
The comfort rating is the temperature at which a standard woman sleeps comfortably — use this for festival planning. The lower limit is for men who run warm. The extreme rating is a survival figure, not a comfort measure — ignore it when choosing a festival sleeping bag.
Is a 3-season sleeping bag warm enough for Glastonbury?
Yes, if it has a 5°C comfort rating or lower. Not all 3-season bags have the same rating — always check the actual comfort temperature, not just the season label. A 3-season bag with a 10°C comfort rating is not warm enough for Glastonbury nights.
Can I use a summer sleeping bag at a UK festival?
Not recommended. Summer bags with 10°C+ comfort ratings will leave most people cold after midnight at UK summer festivals. A 3-season bag with a 5°C comfort rating is the minimum.
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