You're asking me about the weather that we have in May? So, our weather is unpredictable, and you never know what will be tomorrow, but, I suppose, May is quite warm. It assuredly may rain and be cold enough, but it is already felt that spring comes. I can give you an advice to take a light jacket and not warm sweaters with you. As for me, I prefer summer to other seasons because I like the sun and warmth.
Поставь "Лучшее решение", будь добра.