Situated between the Namib and the Kalahari deserts, Namibia has the least rainfall of all sub-Saharan African countries. There are typically two rainy seasons: a small rainy season between September and November, and a larger rainy season between February and April. The winter (June - August) is generally dry. Average rainfall varies from almost zero in the coastal desert to more than 600mm in the north-eastern Zambezi Region. Rainfall is also highly variable in time, and droughts are common, as experienced in 2006/2007 for example when rainfall was far below the annual average, or in 2012/2013 which was the driest season over the last 27 years.