Climate zone: The northern part of Sweden is located in the cold polar zone of the Arctic. The southern areas in the temperate climatic zone.
It won't be really warm here and given to the water temperatures of 17 degrees maximum you will leave your bathing togs at home. Due to the warmer temperatures the best time for traveling is from May to September. Nearly unattractive for tourists are the cold months from November to March.
› Duration of daylight and sunshine in Sweden
hours of sunshine per day rainy days per month Precipitation in mm/day Relative humidity in % Water temperature Absolute humidity in g/m³ (approx.)
Temperature records of the last 70 years
The hottest temperature measured from 1949 to December 2019 was reported by the Karlstad Airp weather station. In June 1999 the record temperature of 39.9 °C was reported here. The hottest summer from July to September, based on all 25 weather stations in Sweden below 380 metres altitude, was recorded in 2006 with an average temperature of 16.2 °C. This average temperature will normally be measured every 4 to 6 hours, thus also including the nights. Normally, this value is 13.5 degrees Celsius. The average maximum daily temperature at that time was 20.8 °C.
The coldest day in these 70 years was reported by the weather station Kvikkjokk Arrenjarka. Here the temperature dropped to -51.8 °C in February 2001. Kvikkjokk Arrenjarka lies at an altitude of 315 meters above sea level. The coldest winter (January to March) was in 1966 with an average temperature of -10.3 °C. In Sweden, it is usual to have about 5.6 degrees more at -4.7 °C for this three-month period.
Long-term development of temperatures from 1986 - 2019
In contrast to single record values, a long-term development cannot simply be brought about by all weather stations in the country. Both the number and the locations are constantly changing. A simply calculated average value would give a falsified result. If several measuring stations in particularly cold mountain or coastal regions are added in one year, the average would already decrease as a result of this alone. If a station fails during the summer or winter months, it does not provide any values and falsifies the average again. The subsequent long-term development was therefore reduced to only 3 measuring points in order to have actually comparable data over as long a period as possible.
In the years 1986 to 2019 there were only these 3 weather stations in the whole country, which reported continuous temperature values (Joenkoeping, Visby, Karlstad). From these weather reports we have created a long-term development that shows the monthly average temperatures. The hottest month in this entire period was Juli 2018 with 20.3 °C. Januar 1987 was the coldest month with an average temperature of -10.2 °C.
The average annual temperature was about 6.3 °C in the years after 1986 and about 7.5 °C in the last years before 2019. So in less than 34 years it has increased by about 1.2 °C. This trend only applies to the selected 3 weather stations in Sweden. A considerably more comprehensive evaluation of the global warming
has been provided separately.
More detailed information on global warming with a view by continent can also be found on our topic page on climate change