of the province is semi-arid with certain locations receiving less than in annual precipitation. South Coast The climate of the coast of British Columbia is generally oceanic (Cfb). The winters are very cloudy, cool, and extremely rainy, although generally above freezing, and the summers are cool and comparatively drier with temperatures generally between . Precipitation is generally around , falling on around 200 days. Coastal fog develops on many days, especially in winter, with sunshine around 1400 hours a year. The exception to British Columbia's wet and cloudy winters is during the El Niño phase. During El Niño events, the jet stream is much farther south across North America, making the province's winters milder and drier than normal. Winters are much wetter and cooler during the opposite phase, La Niña. Lower Mainland Like regions of San Francisco and southern California, the Lower Mainland exhibits a variety of microclimates. Here, the winters are cloudy, cool, and rainy, while the summers are varied across the region. For example, Delta on the southwest tip of the region has summer highs of , while inland regions like Abbotsford and Chilliwack have summers up to and occasionally above . Precipitation is between . Sunshine ranges from 1500 to 2000 hours. Southwest Interior Here, the winters are comparatively colder, with temperatures between , but still very mild for inland locations. Conversely, summer temperatures are the highest in Canada, generally between . Regional averages range from in higher elevations up to in Osoyoos, which has the hottest daytime high temperature in Canada. Although the days are hot, the humidity is low and nights are very cool, reaching in summer. These regions are typically very dry, with some regions receiving less than on around 100 days, strongly contrasting with some of the wettest regions in the world on the coast. In spite of the arid climate, temperature inversions are often created in winter which reduces sunshine to just 1700 to 2000 hours a year, exceptionally little for the dryness. Southeast Interior This region, situated further to the east, typically has similar weather to the southwest interior, although with cooler and wetter conditions due to orographic lift and higher elevation. The winters are between , while the summers are . Cariboo This region typically has cooler weather due to increased latitude and altitude, but is still generally warmer than much of Canada at similar latitudes. Here, the winters are