We do a lot of European travel and have learned (the hard way) that Baltic weather, even in June, is unpredictable. It might be nice and 80, or rainy, dreary, and cold in the low 50s. I suggest you log onto accuweather.com and than you will see "world" towards the upper left. Click on this and than check some of your cities right before you pack. Accuweather has 15 day forecasts which, while not always accurate, will give you the trends.