The Baltic states can be, well, baltic. So it's always best to plan your Riga city break or your weekend in Riga during the peak of summer - July and August. That being said, there's a definite charm to seeing the city during the winter months when there's the chance of snow and Christmas is in full bloom. But a clear blue sky on a summer's day is definitely something special, and it gives you the best chance to fully explore the city - especially Riga Old Town - to your heart's content.