Check out this weather app!

This app analyses the weather of De Bilt. The weather data can be averaged by years or days resulting in a day curve or a year curve. The data can be analysed starting at some year and ending in another. The raw curves are smoothed with a filter. The mouse over is enabled for curves. The first day of summer is calculated from defining summer as the warmest three months of the year. The temperature increase over the years is shown with the year curve. Curves can be also be made for wind, sunshine and rain.