
Port average temperature
The city has a temperate continental climate. Owing to the mitigating influence of the Baltic sea and Gulf stream, temperatures in winter are much higher than the northern location might suggest, with the average in January and February around −5°C. Temperatures below −20°C occur normally a week or two in a year. However, because of the latitude, days lasts less than six hours in the winter solstice, and the very cloudy weather at this time of year accentuates the darkness. Conversely, Helsinki enjoys long days in summer, almost nineteen hours at the summer solstice. The average maximum temperature from June through August is around 19 to 21°C. The highest temperature ever recorded at city centre was 31.6°C on July 18, 1945 and the lowest was −34.3°C on January 10, 1987
The temperate figures shown are based on monthly average weather conditions for the selected port. Weather data is not real-time, and sometimes no data is shown for a specific date, month or port in general.
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