Prague has experienced its hottest summer since records started in 1775, the weather institute said on Thursday.
"Record heat was recorded in Prague this summer, with average temperatures the highest since observations began 244 years ago," the Hydrometeorological Institute said.
Before, the hottest summer was recorded in 2003 with the average temperature of 22.4 degrees, followed by 2015, when the average temperature reached 22.3 degrees Celsius in June, July and August.
Farmers across Europe, including in usually wetter northern regions such as Sweden and the Baltic states, have also suffered from record drought.
Klementinum is the oldest meteorological observatory in the Czech Republic, and it has watched the weather since 1775.