Winters are long (lasting from November to March), cold, and windy, but dry, due to the influence of the Siberian anticyclone, with a January mean temperature of −13.2 °C (8.2 °F). Spring and fall are somewhat short transitional periods, with some precipitation, but are usually dry and windy. Summers are hot and humid, with a prevailing southeasterly wind due to the East Asian monsoon; July averages 23.7 °C (74.7 °F). Snow is usually light during the winter, and annual rainfall is heavily concentrated from June to August. The annual mean temperature is 7.12 °C (44.8 °F).