"Mae hi'n heulog y prynhawn yma."

Translation: It's sunny this afternoon.

[dvdhckn]

It is really hard to understand when to use "y" and when not. Still haven't quite figured it out

[rmcode]

Y = the, in this question 'Y prynhawn yma' means literally 'the afternoon here' which we transpose to English as 'This afternoon'

[dvdhckn]

Diolch yn fawr!