Monaco has a hot-summer Mediterranean climate (Köppen climate classification: ''Csa''), with strong maritime influences, with some resemblances to the oceanic climate (''Cfb'') and the humid subtropical climate (''Cfa''). As a result, it has balmy warm, dry summers and mild, rainy winters. The winters are very mild considering the city's latitude, being as mild as locations located much further south in the Mediterranean Basin. Cool and rainy interludes can interrupt the dry summer season, the average length of which is also shorter. Summer afternoons are infrequently hot (indeed, temperatures greater than  are rare) as the atmosphere is temperate because of constant sea breezes. On the other hand, the nights are very mild, due to the fairly high temperature of the sea in summer. Generally, temperatures do not drop below  in this season. In the winter, frosts and snowfalls are extremely rare and generally occur once or twice every ten years. On 27 February 2018, both Monaco and Monte Carlo experienced snowfall.