The weather is a classic example of a seasonal phenomenon. Our life and work is influenced by weather in a variety of ways. For tourism, the agricultural sector, the energy- and construction sectors, weather is the single most important external influencing factor.

When is the temperature just right at my favourite vacation destination? When does it rain there the least? When does my favourite ski slope have the right amount of snow? Or when does the heat wave begin? Seasonal charts can be used to answer these questions at a glance.

The Financial world has also recognised the economic importance of weather and has accordingly constructed a number of weather indices. Weather derivatives are being increasingly introduced and accommodates this development. smoothes weather data. Also please note that this data is historical.