many species of migratory birds such as pale-bellied brent geese, curlews, and songbirds. The park is also used by the Nordjysk Windsurfing Club and has a six-hole golf course. Aalborg has a number of additional civic parks and recreational facilities. Among them are Kildeparken, which hosts the annual Aalborg Carnival, Mølleparken, which contains a pond, statues, an outdoor exercise facility, and a 2.5 kilometre (1.6 mi) jogging trail (within the trail lies the Lysløjpen, a 45-metre [148 ft] gradient), Sohngårdsholmpark, a wooded area containing trails for both walking/jogging and biking and a six-hole golf course (free to the public), the Aalborg Open Air Swimming Pool, also free to the public, Bundgårdsparken, and Lindholm Strandpark. The Aalborg Zoo was opened in 1935 and typically houses 1,300 animals from 138 different species, including tigers, chimpanzees, zebra, elephants, giraffes, penguins and polar bears. It is one of the area's major tourist attractions with over 300,000 visitors a year. Within the zoo an African savannah has been created where exotic animals are housed. Aalborg was home to an amusement park, Karolinelund, founded in 1946. In 2005, still owned by the founding family, it was sold to an entrepreneur who resold it to the city the following year. When the park closed in 2010, it was home to 17 attractions. Recently, the city has reopened the park to volunteers who wish to return it to operating status. The park is once again open to the public as a leisure facility but without rides and attractions. The association, Platform4, a non-profit user-driven project-oriented venue that experiments with technology (electronics) in combination with artistic genres is now located in the park. Volunteers frequently arrange seminars, exhibitions, films, music concerts, and more which are open to the public. Climate Aalborg has a maritime climate (Cfb), just above the humid continental climate classification (Dfb) with short, mild summers and long, moderately cold winters. Aalborg is cool most of the year, with average high temperatures of around and lows of during the summer, and average temperatures of during the coldest months of January and February, rarely dropping below . The warmest months are typically July and August, with an average temperature of , but by October the temperature averages . June has the highest number of hours of sunshine on average at 218, closely followed by May and July. Precipitation is rather evenly distributed all year around, with an average