Xiangtan has a humid subtropical climate. Within its administrative area, the annual mean temperature ranges from 16.7 to 17.4 °C (62.1 to 63.3 °F), with the coolest month being January, which averages 4.1 °C (39.4 °F), and the hottest July, at 29.7 °C (85.5 °F).
Summer is long and hot.
Autumn is cool and short.
Winter is cold, cloudy damp and long.