    cherbourg-octeville () is a city and commune, situated on the cotentin peninsula in the manche department of lower normandy in north-western france. it is a subprefecture of its department, and was officially formed when the commune of cherbourg absorbed octeville on 28 february 2000. due to its union, it is the most populated city in its department and the second-most in the region after the prefecture, caen. cherbourg holds an arsenal of the french navy. it is also a ferryport, with lines to the english ports of poole and portsmouth, the irish port of rosslare harbour and st helier on jersey. ==geography== cherbourg-octeville is located at the northern tip of the cotentin peninsula, in the department of manche, of which it is a subprefecture. at the time of the 1999 census the city of cherbourg had an area of , while the city of octeville had an area of . the amalgamated city today has an area of . ==climate== {{weather box |location = cherbourg (gonneville) |metric first = yes |single line = yes |jan high c = 7.8 |feb high c = 7.8 |mar high c = 9.9 |apr high c = 11.8 |may high c = 14.9 |jun high c = 17.7 |jul high c = 19.8 |aug high c = 19.9 |sep high c = 18.0 |oct high c = 14.8 |nov high c = 11.0 |dec high c = 8.5 |year high c = |jan low c = 3.5 |feb low c = 3.2 |mar low c = 4.6 |apr low c = 5.7 |may low c = 8.5 |jun low c = 10.9 |jul low c = 13.0 |aug low c = 13.3 |sep low c = 11.8 |oct low c = 9.4 |nov low c = 6.4 |dec low c = 4.2 |year low c = |jan precipitation mm = 100.8 |feb precipitation mm = 69.6 |mar precipitation mm = 69.8 |apr precipitation mm = 61.8 |may precipitation mm = 58.1 |jun precipitation mm = 49.1 |jul precipitation mm = 46.4 |aug precipitation mm = 51.4 |sep precipitation mm = 74.4 |oct precipitation mm = 111.6 |nov precipitation mm = 113.1 |dec precipitation mm = 113.6 |year precipitation mm = |source 1 = [http://www.meteofrance.com/climat/france/gonneville/50209001
Communes_of_Manche Populated_coastal_places_in_France Port_cities_and_towns_on_the_French_Atlantic_coast Subprefectures_in_France