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Oslo (Norway) is a place with a mild continental climate. Temperatures during the day are in the range from -0.4 °C (31.3 °F) in January to 21.8 °C (71.2 °F) in July. The least rainy month in Oslo is March with its 9 days of rain, the rainiest month is November, when it rains 13 days. Temperatures during the night go from -5.1 °C (22.8 °F) in January to 12.5 °C (54.5 °F) in July.
The descent of the sea temperature can be observed, its value is 3.5 °C (38.3 °F) in Oslo, while the day temperature is on its minimum in January. The minimum of the night temperature is observable, its value is -5.1 °C (22.8 °F). The wind speed is on its maximum in this month. The maximum of the humidity can be noticed, with its value being 83 %.
The day temperature starts to rise, the value of this measure is 0.5 °C (32.9 °F) in Oslo, while the minimum of the sea temperature can be noticed, its value is 2.5 °C (36.5 °F). The number of rainy days starts to descent, with its value of 9 days, while the rainfall amount reaches its minimum in February. The number of sun hours (without clouds) starts to rise, with its value of 2 hours.
The rise of the day temperature can be observed, with its value being 4.1 °C (39.4 °F) in Oslo, while the night temperature starts to rise in March. The rainfall amount starts to rise, its value is 53 mm (2.09 in), while the minimum of the number of rainy days is observable, the value of this measure is 9 days. The number of sun hours (without clouds) rises similarly to the previous month, with its value of 4 hours.
The beginning of the rise of the sea temperature could be noticed, its value is 5.5 °C (41.8 °F) in Oslo, while the rise of the day temperature can be observed, the value of this measure is 9.9 °C (49.8 °F). The beginning of the descent of the rainfall amount could be noticed, with its value of 46 mm (1.80 in). The number of sun hours (without clouds) rises similarly to the previous month, the value of this measure is 6 hours. The rise of the night temperature can be observed, with its value being 1.7 °C (35.1 °F).
The day temperature rises similarly to the previous month, its value is 16.1 °C (61.0 °F) in Oslo, and the sea temperature rises similarly to the previous month as well, with its value being 10.3 °C (50.6 °F). The number of rainy days starts to rise, the value of this measure is 10 days, and the rainfall amount starts to rise too, the value of this measure is 53 mm (2.09 in). The humidity reaches its minimum, its value is 65 %. The night temperature continues to rise, its value is 6.4 °C (43.5 °F).
The day temperature continues to rise, with its value of 19.3 °C (66.7 °F) in Oslo, and the rise of the sea temperature can be observed too, with its value of 14.7 °C (58.4 °F). The tourist season slowly starts in June. The rise of the number of rainy days can be observed, the value of this measure is 12 days, and the rainfall amount continues to rise as well, the value of this measure is 72 mm (2.85 in). The maximum of the number of sun hours (without clouds) can be noticed in this month.
There is pending tourist season in Oslo. The maximum of the day temperature can be noticed, with its value of 21.8 °C (71.2 °F), while the rise of the sea temperature can be observed, its value is 17.5 °C (63.6 °F). The rainfall amount rises similarly to the previous month. The night temperature is on its maximum, with its value being 12.5 °C (54.5 °F). The number of sun hours (without clouds) starts to descent in this month.
The ongoing tourist season is noticeable in Oslo. The beginning of the descent of the day temperature could be noticed, the value of this measure is 20.4 °C (68.7 °F), while the sea temperature is on its maximum, its value is 17.9 °C (64.1 °F). The number of rainy days rise's start could be observed, with its value of 13 days, while the rainfall amount reaches its maximum in August. The minimum of the wind speed is observable, with its value being 3.2.
The sea temperature starts to descent, its value is 14.9 °C (58.8 °F) in Oslo, while the descent of the day temperature can be observed, its value is 15.5 °C (59.9 °F). The beginning of the descent of the number of rainy days could be noticed, the value of this measure is 11 days, and the rainfall amount descent's start could be observed as well. The number of sun hours (without clouds) descents similarly to the previous month, with its value being 5 hours. The night temperature descents similarly to the previous month, its value is 8.1 °C (46.6 °F).
The day temperature continues to descent in Oslo, and the sea temperature descents similarly to the previous month too, its value is 11.3 °C (52.4 °F). The number of rainy days rise's start could be observed, with its value being 12 days, and the beginning of the rise of the rainfall amount could be noticed too, with its value being 91 mm (3.58 in). The night temperature continues to descent, with its value being 3.8 °C (38.8 °F). The number of sun hours (without clouds) descents similarly to the previous month, with its value of 3 hours.
The descent of the sea temperature can be observed, the value of this measure is 8.2 °C (46.8 °F) in Oslo, and the day temperature continues to descent as well, the value of this measure is 3.5 °C (38.3 °F). The number of rainy days reaches its maximum, its value is 13 days, while the rainfall amount descent's start could be observed, the value of this measure is 81 mm (3.17 in). The number of sun hours (without clouds) continues to descent, with its value of 2 hours. The night temperature descents similarly to the previous month, with its value being -0.5 °C (31.1 °F).
The day temperature continues to descent, with its value being -0.1 °C (31.8 °F) in Oslo, and the descent of the sea temperature can be observed too, with its value being 5.4 °C (41.7 °F). The beginning of the descent of the number of rainy days could be noticed, its value is 11 days, while the rainfall amount continues to descent, the value of this measure is 57 mm (2.23 in). The night temperature descents similarly to the previous month, with its value being -4.5 °C (23.9 °F). The minimum of the number of sun hours (without clouds) can be noticed, with its value being 1 hours.
In May in Oslo, we can expect 10 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.3 days of the week, or in general - 33 % days.
June is a good month to visit Oslo. There are some people, who may feel a slight chill at 19.3 °C (66.7 °F), but others will feel perfectly fine. The temperature of 10.4 °C (50.7 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
No, there is no wet season in Oslo in July - you can expect 12 days of rain during the month.
In Oslo in August, the average daily temperatures will be 20.4 °C (68.7 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.
The temperature of the sea in Oslo in September is 14.9 °C (58.8 °F). This is a sea temperature for resilient people only, most people won't enjoy swimming in such cold water or will have to use a wetsuit for water activities.