What to Wear in 20 Degree Celsius Weather UK: 6 Easy Outfits
For what to wear in 20 degree Celsius weather in the UK, think T-shirt plus one light layer you can take off: jeans, light trousers or a skirt, trainers, and an overshirt, cardigan or thin jacket for the morning and evening. In full sun you'll be in the tee by lunchtime. Under cloud or with a breeze, you'll want that layer on most of the day.
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What 20 C feels like in the UK
Is 20 degrees hot or cold? In the UK, it's officially a nice day. In a lot of the US it's "mild." Same temperature, different vibe, because the UK is cloudier and windier than people expect, and houses and classrooms aren't built for heat.
For anyone converting: 20 degrees Celsius is 68 degrees Fahrenheit. So "what to wear in 68 degree weather" is the same question.
What 20 C really feels like depends on three things:
- Sun or cloud. 20 C in sun feels warm, almost hot. 20 C under grey sky feels like 16.
- Wind. Seaside 20 C is jumper weather. City 20 C is tee weather.
- Time of day. Mornings and evenings in spring and autumn drop fast.
Sun vs cloud vs rain at 20 C
This is the part most "what to wear in 20 degrees" lists skip. Same number, three different outfits.
| Conditions | What to wear | Layer? |
|---|---|---|
| Sunny, light breeze | Tee, shorts or light trousers, trainers | Tie an overshirt round your waist |
| Cloudy, grey | Tee plus long sleeve or thin knit, jeans | Light jacket or cardigan on |
| Rain, 20 C | Tee, jeans or trousers, waterproof trainers | Thin rain jacket |
| Windy coast | Tee, jumper, jeans | Windbreaker |
What to wear in 20 degree cloudy weather
Go for a long sleeve tee or a thin knit with jeans. You'll feel slightly overdressed for five minutes when the sun peeks out, and correctly dressed for the other five hours.
What to wear in 20 degree rainy weather
Warm rain is awkward: a puffer is too hot and getting soaked is worse. A thin unlined rain jacket or a light windbreaker over a tee is the move. Skip anything suede.
6 outfits for 20 C (20 degree outfit ideas)
1. The classic school or sixth form day
White or black tee, straight jeans, clean trainers, zip hoodie in your bag. Hoodie on for the walk in, off by second period.
2. The uni campus fit
Oversized tee, cargo trousers or wide-leg jeans, trainers, an overshirt worn open. Looks effortless and handles lecture halls that are either freezing or boiling.
3. Sunny day out (what to wear in 20 degree Celsius weather, female)
Linen-look shirt or a cute top, midi skirt or loose shorts, trainers or sandals, a cardigan or denim jacket for the evening. Bring sunglasses; UK sun at 20 C is stronger than it feels.
4. The easy guy fit (what to wear in 20 degree Celsius weather, men)
Polo or tee, chino shorts or light trousers, trainers, a light overshirt. If it's cloudy, swap shorts for straight-leg jeans.
5. The grey-sky outfit
Long sleeve tee or thin crewneck, jeans, trainers, light bomber or denim jacket. This is the most common UK 20 C outfit and nobody talks about it.
6. The rainy-but-warm commute
Tee, straight jeans that don't drag, waterproof or leather trainers, thin hooded rain jacket. Small umbrella if you really want to save your hair.
Do you need a jacket in 20 degrees?
Short answer: bring one, don't necessarily wear one.
- Sunny and still: no jacket needed during the day. Take a light layer if you're out after 7pm.
- Cloudy or breezy: yes, a light jacket or cardigan.
- Rain: a thin waterproof layer.
The layer you want is light and packable: denim jacket, overshirt, zip hoodie, cardigan, thin bomber or windbreaker. Skip anything padded; it'll end up as dead weight in your bag.
Can you wear shorts in 20 degrees?
Yes, if it's sunny. Plenty of people in the UK do. If it's cloudy or windy you'll probably feel chilly in the afternoon, so pair shorts with a hoodie or jumper.
Shoes for a 20 degree day
- Trainers: the default for basically everything.
- Loafers: good for uni, work or a smarter day out.
- Sandals or sliders: only on a sunny day with no rain in the forecast.
- Light boots: fine on a cloudy or rainy 20 C day.
Socks: normal or trainer socks. You don't need thick ones.
Morning cold, afternoon warm
The hardest thing about 20 C days in spring or autumn is the swing. It can be 11 C at 8am and 20 C by 2pm. Here's how to handle it:
- Dress for the afternoon high.
- Add one layer for the morning that's easy to carry.
- Pick a bag with space for it.
The annoying bit is that you have to guess which layer you'll actually wear and which will just sit in your bag. Most of us pick wrong because we're going off vibes.
Instead of guessing every morning, WORN is designed to take one photo of what you actually wore each day. After a month it reads back which layers you really reach for, and suggests tomorrow's outfit from your own clothes. Start my outfit diary
If the forecast is on the chillier side, check our guide to what to wear in 60 degree weather (around 15 to 16 C) for an extra layer.
School, uni and days out
For school (UK and Canada)
If you have a uniform, 20 C is about choosing whether to wear the blazer or jumper. If it's a non-uniform or mufti day, go for outfit 1 above.
For uni or college
You'll be in and out of buildings, so pick a tee you're happy to be seen in once the overshirt comes off.
For a day out, picnic or festival
Outfit 3 or 4, plus a light layer. If you're travelling, our guide to how many outfits to pack for a 7 day trip covers mild-weather packing.
Stop overthinking what to wear in 20 degree Celsius weather in the UK
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FAQ
Is 20 degrees hot or cold in the UK?
It's warm by UK standards and mild by most US standards. In sun it feels warm enough for a tee and shorts; under cloud or wind it feels cooler, so bring a light layer.
What should I wear in 20 degrees if it's raining?
A tee, jeans or trousers and a thin, unlined rain jacket. Warm rain makes a heavy coat too hot, so go light and waterproof, and avoid suede shoes.
Do I need a jacket in 20 degree weather?
Bring a light one. You may not wear it at midday in the sun, but mornings, evenings and cloudy afternoons can feel much cooler than 20 C.
What's a good 20 degree weather outfit for guys?
A tee or polo, straight jeans or chinos (shorts if it's sunny), trainers and an overshirt. It covers school, uni and a day out without changing.
What's 20 degrees Celsius in Fahrenheit?
It's 68 F. If you're used to Fahrenheit, think of it as the comfortable middle of spring: a tee plus a light layer.