and Yorketown; and the port of Ardrossan. A number of smaller coastal towns are popular destinations for fishing and holidays, particularly for people from Adelaide. The south-western tip is occupied by Dhilba Guuranda-Innes National Park. Climate Typical of the southern coastal areas of the state and influenced by the surrounding bodies of water, Yorke Peninsula has a Mediterranean climate, (Koppen: borderline Csa/Csb), with some areas bordering a semi-arid climate, with hot, dry summer and cool, wet winter seasons. Maximum temperatures in summer average around 30°C and in winter average around 12–15°C. Due to the surrounding bodies of water, winter temperatures are moderated and milder than most of the state, with overnight temperatures rarely falling below zero, making frost relatively uncommon in the region. Northerly winds from the desert can bring temperatures above 40°C in summer and occasionally bring very warm winter days well into the 20s. Average precipitation is 4–600 mm, most of which falls from mid-April through to September, though total and seasonal rainfall can vary greatly from year to year. Along with most of southern Australia, monsoonal lows from the north occasionally bring heavy storm events during spring and summer; rainfall is otherwise light and unreliable due to high pressure systems dominating the area. Agriculture Yorke Peninsula is a major producer of grain, particularly barley. Historically this has been sent out by sea because there are no rail services. Most coastal towns on the peninsula have substantial jetties. In the past these were used by ketches, schooners, and later steamships, to collect the grain in bags, and deliver fertiliser and other supplies. As roads in the region improved, and freight-handling techniques changed from bags to bulk, this became obsolete. A deep-water port was opened in 1970 near the south-eastern tip at Port Giles to export grain in bulk, and almost all the other ports ceased to be used for freight in the 1950s and 1960s. The only other ports with bulk-handling facilities are Wallaroo at the north-western side, and Ardrossan at the top of Gulf St Vincent, also used to ship dolomite from a nearby mine for OneSteel. Maitland has a grain-receiving depot operated by AWB, serviced only by road. Wine production commenced on the Peninsula during the 1990s, taking advantage of the rich grey, limestone-based soil. Yorke Peninsula Field Days Acknowledged as Australia's oldest Field Days, the Yorke Peninsula Field Days have been held since 1894. The