The climate of Liverpool features a temperate maritime variety (Köppen: Cfb), with relatively mild summers, cool winters and rainfall spread fairly evenly throughout the year. Since 1867, rainfall and temperature records for the city have been kept at Bidston Observatory, as well as atmospheric pressure records since 1846. However, the site closed down in 2002, and a weather station in Crosby has been used by the Met Office since. Irregular meteorological observations have been taken in the city since at least 1768, with unbroken records extending for long periods of time. This includes observations taken at the Liverpool Dock from 1768 to 1798, an unspecified location from 1772 to 1799 and West Derby from 1830 to 1859 and at other unspecified locations in the city from at least 1860 onwar