Our star The Sun has a dramatic influence on our everyday weather. It is the energy source that drives our planet. Although the Sun's energy output is fairly constant it does have an 11 year sunspot cycle where in the peak years of this cycle, the numbers of sunspots increase and the likleyhood of Solar storm activity also increases. The effects of these storms are felt here on earth in a number of ways, not least in the appearance of Auroras but also it affects all kinds of radio communications. Check out the links below for much more imformation.
Thanks to SOHO & NASA for providing the data on this page