Tradition has it in Ireland and England that if it rains on St Swithun's Day, July 15, it will rain for the next 40 days.
The Germans have a similar tradition. Whatever the weather conditions are on Seven Sleepers Day (Siebenschläfertag) today June 27, those conditions will last for seven weeks.
It's overcast in many parts of Germany today. And the sun shines, at least early morning, in Dublin today.