Winters are relatively cold and snowy. Weather can be very unstable and dynamic with sudden significant temperature amplitudes. In the coldest days temperatures can drop below , most notably in January. The lowest recorded temperature is  (16 January 1893). Fog is not unusual, especially in the beginning of the season. On average, Sofia receives a total snowfall of  and 57 days with snow cover. The snowiest recorded winter was 1995/1996 with a total snowfall of . The record snow depth is  (25 December 2001). The coldest recorded year was 1893 with an average January temperature of  and an annual temperature of .