Vestfold is a
county in
Norway, bordering
Buskerud and
Telemark. The county administration is in
Tønsberg. Vestfold is located west of the
Oslofjord, as the name indicates. It includes many smaller, but well-known towns in Norway, such as
Larvik,
Sandefjord,
Tønsberg and
Horten. The river
Numedalslågen runs through the district. Many islands are located at the coast. Vestfold is mostly dominated by lowland and is among the best agricultural areas of Norway. Winters last about three months, while pleasant summer temperatures last from May to September, with a July average of 17°C.