The city has a well known reputation for unpredictable and extreme weather, ranging from snowfall to intense heatwaves. Perhaps the most infamous feature of Ballarat's climate is the chilly winter, often accentuated by driving winds.Temperatures can dip below freezing from May to September, however a low of 0-2 C° is more common - widespread frosts and fog are a regular sight. Snowfall typically falls on nearby Mount Buninyong and Mount Warrenheip a few times a year, but in the urban area only once or twice, particularly during heavy winters. Snow has been known to fall heavily with several inches accumulating even in the CBD. Heavy snow seasons occurred in 1900–1902 and 1905–1907 (with record falls in 1906), and moderate snow seasons were recorded during the 1940s and 1980s. Snowfalls in the urban area have occurred in recent years: November 2006 (light), July 2007 (heavy), June 2008 (light), August 2008 (light), August 2014 (moderate) and June 2016 (light), July 2017 (light), June 2018 (moderate), May 2019 (light), and August and September 2020 (light and heavy). mean annual rainfall is , with August being the wettest month (). There are an average of 198 rain-free days per year. Like much of Australia, Ballarat experiences cyclical drought and heavy rainfall. Flooding of the Yarrowee catchment occurs occasionally. In 1869 a serious flood of the Yarrowee River put most of the lower section of business district including Bridge and Grenville streets under water and caused the loss of two lives. Prolonged drought (an average annual rainfall with falls averaging as low as per year since 2001) caused Lake Wendouree to dry up completely for the first time in its history between 2006 and 2007. More recently higher rainfall levels have been recorded including in the 24 hours to 9 am on 14 January 2011, ending a four-day period of flooding rains across much of Victoria and Tasmania, and contributing to the wettest January on record, with a total of of rain for the month.