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20°+ Warm
20°C+ Short sleeves, open collars, one layer and done.
15–20° Mild
15–20°C Long sleeves and a light layer you can take off by noon.
10–15° Fresh
10–15°C The British default: a knit or an overshirt over a long sleeve.
5–10° Cold
5–10°C Three layers: a base, a heavy knit, a padded jacket.
<5° Bitter
below 5°C Chunky knit, padded gilet, padded jacket, scarf and hat.

Wardrobe chart What to wear Bag, items: 0

What to wear at 15–20°C

Long sleeves and a light layer you can take off by noon.

Layered outfit for 15–20°C

2 pieces labelled 15–20°C

Jackets

L3 Outer layer

15–20°C

18° Short Trench Jacket

£62L3

15–20°C

16° Chore Jacket

£58L3

Temperature ranges are a styling guide based on everyday walking in light wind. They are not a laboratory warmth rating. How we set them