Winnipeg's location in the Canadian Prairies gives it a warm-summer humid continental climate (Köppen "Dfb"), with warm, humid summers, and long, severely cold winters. Summers have a July mean average of . Winters are the coldest and driest time of year, with the January mean average around and total winter precipitation averaging . Temperatures occasionally drop below . The actual air temperature drops below on average 12.6 days annually and rises above 13.3 days of the year. On average there are 317.8 days per year with measurable sunshine, with July seeing the most on average. With 2353 hours of sunshine per year, Winnipeg is the second sunniest city in Canada. Total annual precipitation (both rain and snow) is just over . Thunderstorms are very common during summer, and sometimes severe enough to produce tornadoes. Low wind chill values are a common occurrence in the local climate. The wind chill has gone down as low as and on average there are twelve days of the year that can reach a wind chill below .