China covers extensive territory and has a complex topography, therefore the weather differs substantially from region to region. The southeast, below the Nanling Mountains, tends to be very wet with high temperatures all year round. In the central Yangtze and Huaihe River valleys there are four distinct seasons with very hot summers and extremely cold winters, and rain all year round. The dry north experiences a short but sunny summer, with long, bitterly cold winters (between December and March), with temperatures in Beijing dropping as low as -4ºF (-20ºC). The coast is humid and experiences Typhoons during summer. Travellers are advised to research the climate for the specific region they are visiting.