Severe frost and scorching heat here are quite rare and are usually of short duration. Frosts in the cold season (significant deviation from the norm by more than 4 degrees) are set more often than not more than 2-3 weeks, and the summer heat can last from 3-4 days to 1.5 months (summer 1920 1936 1938, 1972, 2010, 2011).
In the city the climate is influenced by geographical location (in the temperate zone in the center of the East European Plain, which allows you to freely propagating waves of heat and cold); the absence of large bodies of water, which contributes to a rather large temperature fluctuations; and the influence of the Gulf Stream, caused by the Atlantic and Mediterranean cyclones, providing a relatively high temperature in the winter compared to other settlements located to the east at the same latitude, and high levels of precipitation. In some winter months (December 2001, December 2002, January 2010, mostly in December and January) is observed thaw in Moscow.
Last year in Moscow is about 30 thunderstorms, mainly between May and September, which are often caused by local convection due to intense heating in the warm period. Rarer, but the strongest (front) thunderstorms occur during the passage of atmospheric fronts and are observed throughout the year, including winter.