We have extended our city climate offer and added Tallinn to our website. Tallinn is located in Estonia, on the coast of the Baltic Sea. The spatial proximity to the sea makes this city very interesting from a weather point of view. Our partners have therefore installed 18 sensors to monitor temperature and precipitation in different parts of the city. The live measurement data are displayed on the designated city climate page for Tallinn.
The map shows the positions of the stations with dots of different colours, depending on the temperature or the precipitation amount. When clicking on one station, you can see the temperature and precipitation curve from the last few days and a picture of the weather station. Already during the first month of recording data, a temperature difference of 2-4 °C between urban construction and green areas has been observed (see graph). The air temperature in urban construction areas is typically higher than the air temperature in green areas because solar radiation energy is rapidly absorbed by and stored in buildings during the daytime and released during the night in form of heat. Therefore, a regular summertime daytime temperature reduction of 2-4°C was observed in the green areas.
In addition, we have added a new chart for each city, analyzing historical weather data since 1979. The graph shows the number of summer days (max. daily temperature > 25°C), heat days (max. daily temperature > 30°C) and tropical nights (min. temperature during night > 20°C) for each year. The red lines show the mean air temperature over the year, and the purple line represents the hours with the air temperature above 30°C. This tool shows how temperatures developed over time and compares different years.
The new chart is now available for all cities on display, including Basel and Zurich.
