and shales formed 300 million years ago in the Carboniferous period. Most of Britain at this time was a huge delta carrying vast amounts of sediment. These belong to the Millstone Grit formation which makes up much of the Peak District. Allestree's highest point is in the northern part of Allestree Park next to the water tower. This is also the highest part of the city of Derby. Gallery Climate Because of its location in southern Derbyshire, Allestree has a temperate climate (Köppen climate classification Cfb) with a small variation in daily and annual temperatures. The warmest month is July, with an average temperature range of 11.4 °C to 21.3 °C, and the coolest month is January, with a range of 1.2 °C to 6.9 °C. Maximum and minimum temperatures throughout the year are around the England average, and as with most of England, Allestree is in AHS Heat zone 2. South Derbyshire's average annual rainfall is about , with October to January being the wettest period but October being the wettest month, compared with the national average of . Landmarks Allestree Park and Hall The area known as Allestree Park was enclosed in about 1818 and lies in the northern part of Allestree just inside the city boundaries. It has over of parkland, an 18-hole golf course, a permanent orienteering course and an angling lake. The park area, not including the golf course, has been designated a nature reserve because of the diversity of habitats and species present. The main habitats present within the reserve include a large area of woodland to the north, a number of fields with a mixture of quality of grassland and a stream that flows through the site and a number of associated marshes. Allestree Hall is a 19th-century former country house in Allestree Park. It is a Grade II* listed building made of millstone grit from Derwent Bank. The house was begun by Bache Thornhill and completed by John Giradot (High Sheriff of Derbyshire) with three storeys and five bays, the central three bowed with an ionic columned porch. Since the 1980s the hall has been unoccupied, and was included in the English Heritage at Risk Register 2010, which states that the internal condition of the building is poor but fair overall. The city and English Heritage are looking to find a suitable scheme to enable its redevelopment. , it remained on the