Shanghai has a monsoon-influenced humid subtropical climate. The region experiences all four seasons, with freezing temperatures during the winter and a 32 degrees Celsius (90 degrees Fahrenheit) average high during the hottest months of July and August. Temperature extremes of -10C (14F) and +41C (105F) have been recorded. Heavy rain is frequent in early summer. Spring starts in March, summer in June, autumn in September and winter in December. The weather in spring, although considered the most beautiful season, is highly variable, with frequent rain and alternating spells of warmth and cold. Summers can be sweltering and humid. Autumn is generally sunny and dry, and the foliage season is in November. Winters are typically grey and dreary, with little or no snowfall. The city has a few typhoon spells during the year, none of which in recent years has caused considerable damage.