Tokyo lies in the humid subtropical climate zone (Koppen climate classification Cfa),[28] with hot humid summers and generally mild winters with cool spells. The region, like much of Japan, experiences a one-month seasonal lag, with the warmest month being August, which averages 27.5 °C (81.5 °F), and the coolest month being January, averaging 6.0 °C (42.8 °F). Annual rainfall averages nearly 1,470 millimetres (57.9 in), with a wetter summer and a drier winter. Snowfall is sporadic, but does occur almost annually. Tokyo also often sees typhoons each year, though few are strong. The last one to hit was Fitow in 2007.