Amsterdam has a cool oceanic climate that is strongly influenced by the North Sea. Thanks to the moderating effects of the Gulf Stream, the weather in Amsterdam is relatively mild in the winter (December to March), though temperatures can drop below freezing. The weather in Amsterdam in summer (June to August) is mild, with generally cool days around 22°C and nights, as well as occasional rain. Autumn (September to November) is a nice compromise but can be windy. Spring (April and May) can be wet but is also a fresh and lively time to enjoy Amsterdam.