Not only British love talking about weather.. Polish people as well.
If the day is so beautiful like today, you might hear:
Jest słonecznie. - It is sunny.
Jest ciepło.- It is warm.
Jest gorąco.- It is hot.
Ale upał!- 'upał' is a noun which you can use when it is really hot and Polish 'ale'= English 'so' or 'such'.
Ale gorąco! - So hot!
Ale piękny dzień!- Such a beautiful day!
Many of my students very often say: 'Pogoda jest dobra' (as in English we say: 'The weather is good'). It is wrong. You should say:
Pogoda jest ładna. or Pogoda jest piękna. (exactly the same adjectives which we use to describe a girl).