"At 15:00 Moscow time (noon GMT), the air temperature climbed to 6.6 degrees Celsius in northern Moscow, breaking the 1961 record and setting a new one for December 3," the report says.
On December 3, 1961, the temperature in the capital reached 6.2 degrees Celsius (43.2 degrees Fahrenheit). The average high and low temperatures in December in Moscow are -4 and -8 degrees Celsius (24.8 and 17.6 degrees Fahrenheit), respectively.
The day was also the warmest for the surrounding region, where the temperature reached 6.1 degrees Celsius (43 degrees Fahrenheit), surpassing a 0.5 degrees Celsius reading set in 1979.
The Russian capital has seen a spell of unusually warm weather in recent months. On November 12, the temperature in Moscow reached 8.9 degrees Celsius (48 degrees Fahrenheit), setting a new record.
This October was the warmest on record in Moscow, with an average temperature of over 9 degrees Celsius (48.2 degree Fahrenheit).