The temperatures in the northern Greek mountains dropped to almost -08C on Tuesday morning, the Athens National Observatory's meteo service/ meteo.gr said.
The lowest temperatures were recorded at Lailias in the region of Serres (-7.9C), in Paranesti, Drama (-5.7C), Volakas, Nevrokopi (-4.5C), Seli, Vermio (-4.5C), and Ohyro, Nevrokopi (-4.1C). 
According to the latest forecast of meteo.gr, gale-force northerly winds will blow in the Aegean reaching upto 8-9 on the Beaufort scale in some parts of the Aegean.