Johannesburg features a Subtropical highland climate (Köppen Cwb). The city enjoys a dry, sunny climate with late afternoon thundershowers in the summer months of October to April. Temperatures in Johannesburg are usually fairly mild due to the city's high elevation, with the average maximum daytime temperature in January of 25.6 °C(78.1 °F), dropping to an average maximum of around 16 °C (61 °F) in June. Winter is the sunniest time of the year, with mild days and cool nights, dropping to 4.1 °C (39.4 °F) in June and July. The temperature occasionally drops to below freezing at night, causing frost. Snow is a rare occurrence, with snowfall having been experienced in May 1956, August 1962, June 1964, September 1981, and with light sleet in August 2006. Snow fell again on 27 June 2007, accumulating up to 10 centimetres (3.9 in) in the southern suburbs, and then again on 7 August 2012. Regular cold fronts pass over in winter bringing very cold southerly winds but usually clear skies. The annual average rainfall is 713 millimetres (28.1 in), which is mostly concentrated in the summer months. Infrequent showers occur through the course of the winter months. The lowest nighttime minimum temperature at Johannesburg is −8.2 °C (17.2 °F), recorded on the 13th June 1979. The lowest daytime maximum temperature is 1.5 °C (34.7 °F), recorded on the 19th June
