Temperatures in Moscow could exceed 29 degrees Celsius on Monday, breaking record temperatures for May 13 from the end of the 20th century, the federal weather service said.
"The temperature record of 28.6 degrees for May 13, which was set back in 1883, may be surpassed," a weather service spokesperson told Interfax.
Weather forecasters say the current hot weather in the capital is uncharacteristic for May, and that the temperature is eight to nine degrees higher than normal.
According to the Moscow weather bureau, the previous records of 28.4 degrees for May 14 in 1996 and 27.9 degrees for May 15 in 1946 may also be broken over the next two days, adding that intermittent rainfall in the capital can be expected throughout the week.
In summer 2010, a scorching heat wave gripped much of western Russia sparking wildfires and causing the worst drought in decades as record high temperatures were surpassed more than 20 times over a two-month period.