June to August in Europe is known as High Season (which means you can expect wonderful summer weather but the downside is quite a few crowds). Any destination in Europe will be a great destination during high season.
If you really put your mind to it, and constantly expose yourself to a language then you may find that you can speak it with relative ease within about 6 months, although as mentioned before, you would really need to be living in a country that speaks that language in order to get to this stage.
There are, however, proven ways you can nudge language development along, experts say. Check out our stage-by-stage (and completely anxiety-free!) guide to baby talk for the scoop on what you'll hear, when to expect it, and how best to keep up your end of the conversation. 1 Month.