Huai River
As with topography, the province differs in climate from north to south. The north is more temperate and has more clearcut seasons. January temperatures average at around −1 to 2 °C north of the Huai River, and 0 to 3 °C south of the Huai River; in July temperatures average 27 °C or above. Plum rains occur in June and July and may cause flooding.