"Oslo has a hemiboreal/humid continental climate (Dfb according to the Köppen climate classification system). Summers are mild or even warm, with daily high temperatures averaging between 20.1 °C (68.2 °F) and 21.5 °C (70.7 °F) during the summer months (June-August). September is oten as warm, with colder temperatures usually arriving before the end of October. The highest temperature ever recorded was 35 °C (95 °F) on 21 July 1901. There are four distinct seasons, with winter lasting from early december to march, and spring arriving in april, lasting out may. Summer ranges from June to late august. Autumn/fall usually comes mid-september with cooler air and more unstable weather, and lasts throughout november. Heatwaves are not rare during the summer, usually pushing the temperatures above 30C (86F).

The Oslofjord has many public beaches and recreational areas, which are very popular in the summer months. Due to the fjord being sort of an enclosed body of water, the water temperatures can get quite high if the weather stays warm. During the summer of 2008, the water reached a temperature of 24C (75F).

The winter is cold, chilly and wet. Temperatures can drop down to −20 °C (−4.0 °F) or lower when there is high pressure and blue skies. Almost every winter, ice develops in the inner parts of the Oslofjord. Temperatures below zero may be experienced from October until May, the coldest month being January with a mean temperature of −4.3 °C (24 °F), and both January and February may have daily minimum temperatures of around −7 °C (19.4 °F). The coldest temperature recorded is −27.9 °C (−18 °F) in February 1871. Snowfall is spread evenly throughout the winter months and on average more than 25 centimetres (9.8 in) of snow cover is experienced 30 days per year. Temperatures have tended to be higher in recent years.

The annual average precipitation is 763 millimetres (30.0 in), with winter being somewhat drier than summer."

This articol is release from GNU Free Documentation License. It use material from Wikipedia voices: "Oslo".