As someone who has emmigrated (from mainland Europe to the UK) let me tell you that moving countries for the chance of better weather is bloody stuipd and will make you miserable, no matter what.
You have to move for the love of the country itself. You will be leaving behind your family and entire support network, so, without knowing the language, life will be even more difficult. New laws, a new food culture, leaving behind a number of creature comforts (love black tea? Good look finding a halfway decent one abroad anywhere but GB. I still miss a particular dessert that is just never sold abroad and hoard it whenever I get back), lots of different ways of doing things.
I used to think that my culture was very similar to the British one, until I moved here and found, even 20 years later, that I can still be surprised at how differently things are done sometimes.
Also know how many rights you might be leaving behind. Until I became a citizen (after 5 years, lots of money spent and two rounds of academic tests), poof went my right to vote. In some countries you will not have access to free at the point of use healthcare without solid insurance, which sometimes only comes after you have started receiving benefits (which again will start after 6 months if you're lucky, after a few years if not) or after you have managed to get a job, the latter of which will be nigh on impossible without knowing the language. Oh, and a welfare network? All of Europe are tightening theirs so that no one receives it upon entering the country, so if something bad befalls you, good luck. Will you need to get a new driving licence? Will your qualifications be recognised? (mine are not)
Moving countries is not easy on your own, let alone with a potential family. So don't do it for the hope of better weather.