What do babies wear when out?

Tuli • 39yo. Pregnant after 1st FET. Ttc since 05/16. 2 iui, 2nd ended in chemical. Cervical stenosis after lletz

I bought quite a lot of baby clothes already but just realised they are all onesies or sleep suits... do babies wear jumpers? How would you dress a newborn for going outside in winter temperature? (7 degrees c)

Thanks!