Tasmania has a cool temperate climate with four distinct seasons. Summer lasts from December to February when the average maximum sea temperature is 21 °C (70 °F). On land, maximum temperatures average 20 °C (68 °F) to 24 °C (75 °F) along the coast and in the lowlands, such as around Launceston.The hottest areas of the state are in the valleys west of Hobart, where summer temperatures regularly rise above 25 °C (77 °F).he warmest months are in January and February with an average air temperature range of 12.2 °C (54 °F) up to 26.4 °C (80 °F). Throughout the year there is an average of 8.3 days a year over 30 °C (86 °F).