The body of the 66-year-old woman was recovered from an overturned car in the south-eastern Keratea region of Greece following almost a week of sub-zero temperatures, blasting winds and snowfall across the country.
Two men who were believed to have also been in the vehicle remain unaccounted for.
“Her husband and one more man, who were in the same car, have been reported missing since Thursday when bad weather conditions prevailed in the area,” a police official said.
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Public transport has also been severely disrupted during the unusually cold spell with flights rerouted and roads closed, the Greek civil protection service reports.
It urged municipal authorities to be prepared for more bad weather from Monday.
Meanwhile, roads have been closed, flights cancelled and trains rerouted across Germany and Austria because of similar conditions.
Munich Airport, the second largest in Germany, saw 120 flights axed and others delayed while workers cleared runways of snow and removed ice from planes.
In Austria, the small town of St Johann, in the Tyrol region, was evacuated because authorities feared strong winds could trigger a large avalanche.
Further east in the village of Soelktal, some 600 residents and tourists were ordered to stay put following a road closure, the Austrian broadcaster ORF reported.
Further significant snowfall is forecast for southern Germany, Austria and Switzerland in coming days.