100 years of scientific forecasting

The sky appears blue to the human eye as the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible.

As a low-pressure system moves eastward away from the UK today it allows cold Arctic air already in place for parts of Scotland, to spread south across the rest of the UK by early Tuesday.

The weather forecast for the Coronation of Their Majesties King Charles III and Queen Camilla.