Snow isn't super common, it's not like New England or anything usually, but it is typically grey, overcast, windy and pissing it down with rain. Buy a water and windproof coat if you can find one
I visited last year in January and I swear I felt like I was going to die lol I've been in Miami most of my life except when I lived in Egypt for a few years studying abroad - but both Egypt and Miami are warm!
I've been told Egypt gets horrifically cold at night, but yeah, you will need warm weather clothes here. Jumpers (pullovers? Cardigans? Whatever you people call them), trousers/long skirts/leggins/tights etc.
It's super warm today, but nothing near Miami and projected only to last this week. Then it will go back to the usual spring grey with occasional rain.
I guess it's time to order pullovers/Jumpers and cardigans online. On the bright side atleast I won't need too many bags since 98% of my closet is summer clothes.