* Das Wetter am Siebenschläfertag sieben Wochen bleiben mag
* Wie's Wetter am Siebenschläfertag, so der Juli werden mag
* Wenn die Siebenschläfer Regen kochen, dann regnet’s ganze sieben Wochen
The rhyme doesn't owe its name - as commonly thought - to the Siebenschläfer, a kind of dormouse, which is a small rodent, but to an ancient legend: the "Seven Sleepers of Ephesus", a Christian legend dating from around the 6th century. Statistically the weather on Siebenschläfertag has a 60-70% likelihood of being predictive in southern Germany, but very rarely holds true for northern Germany.
i know that in the uk they have st. swithin's day with the same idea but it's on july 15 and 'predicts' the weather for the next 40 days. the americans have groundhog day, which, according to this isn't the same as siebenschläfer either: http://www.suite101.com/article.cfm/germ
how about in your country, wherever you are? do you have anything like this?