The Western Cape is also diverse climatologically, with many distinct micro- and macroclimates created by the varied topography and the influence of both the Indian (warm water) and Atlantic (cold water) oceans, thus climatic statistics can vary wildly over very short distances. Most of the province is considered to have a Mediterranean climate with cool, wet winters and warm, dry summers. The interior Karoo has a semi-arid climate with cold, frosty winters and hot summers with occasional thunderstorms. The Garden Route and the Overberg on the south coast have a maritime climate with cool, moist winters and mild, moist summers. Mossel Bay in the Garden Route is considered to have the second mildest climate worldwide after Hawaii. Thunderstorms are generally rare in the province, except in the Karoo interior, with most precipitation being of a frontal or orographic nature. Extremes of heat and cold are common inland, but rare near the coast. Snow is a common winter occurrence on the higher lying ground, however frost is relatively rare in coastal areas and many of the heavily cultivated valleys. The dependency of the Prince Edward Islands are subantarctic islands, which experience year-round cool to cold temperatures with high precipitation and little annual deviation on both accounts.