This follows from the weather forecast issued by the Czech Hydrometeorological Institute.
Forecast for Friday:
During the day cloudy to overcast and in most areas showers, sometimes thunderstorms, occasionally strong. The lowest night temperatures 18 to 14 ° C. The highest daily temperatures are 27 to 31 ° C, in the west and southwest around 26 ° C, in 1000 m in the mountains around 22 ° C. Light variable wind 1 to 4 m / s, temporarily intensifying in thunderstorms.
Also read:
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–Saturday forecast:
Cloudy to overcast, rain or showers in most areas, thunderstorms in some places. Scattered mists in the morning. The lowest night temperatures 18 to 14 ° C. The highest daily temperatures 23 to 27 ° C. Light variable wind 1 to 4 m / s, temporarily intensifying in thunderstorms.Sunday forecast:
Mostly partly cloudy, especially in the afternoon with showers or thunderstorms. Scattered mists in the morning. The lowest night temperatures 16 to 12 ° C. The highest daily temperatures are 25 to 29 ° C. Slight east wind 2 to 5 m / s.–