The following is a list of the most extreme temperatures ever recorded in Greece.

Greece has recorded a high temperature of 48.0 °C in Elefsina and Tatoi (both located in the Athens metropolitan area). In June 2007, Monemvasia in mainland Greece recorded a minimum temperature of 35.9 °C.^[1][2][3]

The lowest temperature ever recorded was -27.8 °C in Ptolemaida on the 27th of January 1963 (a sinkhole in Kechroti recorded -35.3 °C in January 2012).^[4][5]

According to the national press of the time, on the 10th of July 1977 the Hellenic National Meteorological Service station in Almyros recorded 49.0 °C, the second station in Tatoi (belonging to the National Observatory of Athens) recorded 48.7 °C ^[6] and the stations in Volos, Velestino and Messara^[vague] registered 48.0 °C (these readings have not been confirmed).^{[7][8][9][10]}

On the night between 25 and 26 of June 2007 the temperature did not drop below 38.0 °C in the Palaiochora National Observatory of Athens station.^[11] On the night of the 11th of January 2021 the National Observatory of Athens station in Falasarna recorded a temperature of 28.3 °C due to strong Föhn winds while the minimum temperature for that day was 22.6 °C marking both the highest January temperature during a night and the highest January minimum temperature ever recorded in Greece.^{[12] [13][14]}