The world climate is obviously changing and we can say that it becomes much hotter year to year.
Speaking about Belarus we should mention that it has a temperate climate but sometimes it can be rather hot in summer.
Usually, average summer temperatures range from +17 C to +25 C, but there were some really hot summers as one in 2010 when temperature was even as high as +39 C.Some recent years have also been rather hot and people preferred to go to the lakes or rivers.Such weather is pleasant and people can swim, sunbathe or just relax in the sun.During hot days thunderstorms or hurricanes may happen, especially in the afternoon or in the evening.I can say that in general the climate is mild, pleasant and everybody is happy when the days are warm, because they are never too hot.
According to my own experience Belarus is still a rather cold country and it's very difficult to write about its heat)
I visited it in June and the weather was cool if not cold.
We had to wear jackets and jeans, though in the southern parts of the country it was a bit warmer.