Uttarakhand has a highly varied topography, with snow-covered peaks, glaciers, deep canyons, roaring streams, beautiful lakes, and a few patches of dusty plains in the south. It is divided into two recognized geo-cultural regions: the Garhwal, which corresponds roughly to the north-western half of the state, and the Kumaun, which spans the south-east. Some of the highest mountains in the world are found in Uttarakhand. January is the coldest month, with daily high temperatures averaging below freezing. May is the warmest month, with daily temperatures normally reaching about 38 °C to 27 °C. From July to September is monsoon season and floods and landslides are problems during this period.