Changsha Weather

Changsha has a humid subtropical climate , with annual average temperature being at 17.40 °C (63.3 °F), with a mean of 4.9 °C (40.8 °F) in January and 29.2 °C (84.6 °F) in July. Average annual precipitation is 1,428 millimetres (56.2 in), with a 275-day frost-free period. With a monthly possible-sunshine percentage ranging from 19% in March to 57% in August, the city receives 1,545 hours of bright sunshine annually. The four seasons are distinct. The summers are long and very hot, with heavy rainfall, and autumn is comfortable and is the driest season. Winter is chilly and overcast with lighter rainfall more likely than downpours; cold snaps occur with temperatures occasionally dropping below freezing. Spring is especially rainy and humid with the sun shining less than 30% of the time. The minimum temperature ever recorded since 1951 at the current Wangchengpo Weather Observing Station was −12.0 °C (10.4 °F), recorded on 9 February 1972. The maximum was 40.6 °C (105.1 °F) on 13 August 1953 and 2 August 2003 [the unofficial record of 43.0 °C (109.4 °F) was set on 10 August 1934].