What to Wear in Milan in January

January is the coldest month at Linate and the one with the most frost. NOAA's record gives 7.4°C / 45°F by day and −0.4°C at night, with frost on about 19 nights, and ARPA Lombardia says the Po plain's frost days peak between January and February. Fog is the other cold: on 9 January 2020 ARPA found the temperature inside a fog layer over the plain "oscillando intorno a zero gradi", barely moving between night and day. Treccani's giorni della merla, the last three days, are folklore laid over that. Pack one coat for the 5th and the 29th, two knits, and boots with a lining and a lug.

The capsule

1. 
   01

   Brown houndstooth wool coat, below the knee

   Linate averages −0.4°C at night in January, with about 19 frost nights, so the coat buttons over two knits. A small brown-on-cream houndstooth carries the chocolate bag and the burgundy knits as one palette and shows road spray less than a pale coat would. Below the knee, it covers the trousers down to the boot; on a 7°C / 45°F afternoon it hangs open.

2. 
   02

   Cream fine-rib turtleneck

   A high neck closes the gap a coat collar leaves on a night that falls to 0°C / 32°F. Fine rib sits flat under the check coat without a roll of fabric at the throat, and cream is the one light tone in a brown and burgundy capsule. It is the piece that stays on in a heated shop when the coat and the crew come off.

3. 
   03

   Deep burgundy lambswool crew

   Wear it over the turtleneck on frost mornings and on fog days: ARPA Lombardia found that inside the fog "la temperatura varia di poco tra la notte e il giorno", so the afternoon stays near zero. On a clear day it comes off by lunch and folds into the bag. Burgundy is the colour the gloves and the beret repeat.

4. 
   04

   Light grey pleated wide-leg trousers

   Pleated, wide and full length, they cover the ankle down to the boot collar and leave room for a thermal legging underneath on the merla mornings. The warmth sits in the layers around them: two knits, a coat that falls below the knee, shearling at the ankle. Light grey lifts a capsule of brown and burgundy, and the pleats read as tailoring at a shop counter.

5. 
   05

   Black leather lace-up boots, shearling collar, lug sole

   Shearling at the collar is for mornings below freezing, and the lug is for about 7 wet days, 3 or so of them heavier than 2.5 mm. Laces and a block heel hold the foot through a long walking day from the Duomo to Brera. They are slower in a fitting room, so loosen the laces before a sales day.

6. 
   06

   Chocolate pebbled leather zip bag

   With gloves on, you want a bag that stays shut without a hand on it: a zip, and a short strap worn across the body. The UK Foreign Office warns of pickpocketing in Italian city centres and asks you to take care in crowded areas. Chocolate pebbled leather sits beside the brown check coat instead of fighting it, and holds a phone, a card and folded receipts.

7. 
   07

   Burgundy leather gloves, lined

   On a frost morning your hands are out at shop windows, ticket machines and the tram stop. A lined leather glove in the burgundy of the crew keeps the wrist covered when the coat sleeve rides up, and a short cuff still lets you take a card out of the zip bag at the till without pulling the glove off.

8. 
   08

   Plain burgundy wool beret

   On a frost morning the ears feel it first, and inside a winter fog the air stays near zero all day. A plain wool beret in the crew's burgundy, with no badge and no logo, sits flat on the head under any coat collar and stays on between shops and on the walk to dinner. It folds into the bag in a heated shop without creasing.

A suggested look — brown check wool coat, cream ribbed turtleneck, burgundy crew knit, light grey pleated trousers, black shearling-collar lug boots.

What to avoid

• Dressing for 7°C / 45°F on a fog day. Inside the fog it stays near zero
• A smooth leather sole. Frost on about 19 nights, rain on about 7 days
• Treating 29 to 31 January as the only cold days. The saying is not the measurement
• Shopping just before the sales open. No promotional discounts for 30 days
• An open tote in a crowded shop. Pickpockets work city centres