Hefei people enjoy a fairly mild climate with distinct seasons and sufficient precipitation. It is the coldest in January, with an average temperature of 2 °C (36 °F); and it is the hottest in July, with an average temperature of 28 °C (82 °F). The annual average temperature is 16 °C (61 °F), and the mean precipitation is about 1000 millimetres. In spring and autumn, the temperature varies a lot. The rain mainly falls in the summer. About 228 days a year are frost-free; and the average relative humidity is 77%. The best time to tour to enjoy the scenic areas and the ancient sites is from April to October.