Today sees the beginning of astronomical summer which brings the shortest night of the year and the day the longest. After today, the days will shorten until the winter solstice. According to Czech meteorologists, the beginning of the astronomical summer will be accompanied by partly cloudy to cloudy weather, but in most areas, it will eventually be overcast with rain, and in some places, storms could appear. Daytime temperatures should remain high today, around 30 degrees with cooling over the next few days. Astronomical summer is the period from the summer solstice to the autumnal equinox, while in the southern hemisphere it is astronomical winter at this time. The climatological summer lasts from June 1 to August 31. ČTK