You may use those buttons freely on any website. The only limitation is that you may only use 2 buttons at the same time on the same page. Although it's no condition, we would also appreciate, if the button would link back to us. The link may go to our home page or e.g. to the corresponding city forecast page.
To get a button, right click on the button you'd like to use and copy the image address. Then include this address in your website. The buttons are updated in the same intervall as any other information on saakeskus.fi - every 6 hours.