S278 – In de winter is het hier steenkoud.

S278- It is bitterly cold here in winter.

Explaination -

in – in, at

de – the (definite article)

de winter – winter

zijn – 1. to be 2. his 3. to equal

het – 1. the (neuter definite article) 2. it

hier – 1. here 2. this

steenkoud – bitterly cold, stone-cold, very cold