Cambridge is a university city and the county town of Cambridgeshire, England, on the River Cam about 50 miles (80 km) north of London. At the United Kingdom Census 2011, its population was 123,867, including 24,488 students. The city, like most of the UK, has a maritime climate highly influenced by the Gulf Stream. Cambridge's rainfall averages around 570 mm (22.44 in) per year, around half the national average, temperatures vary between 50C in winter and 150C in summer. Several fairs and festivals take place in Cambridge, mostly during the British summer. There are many museums, art galleries and places of interest in Cambridge.