The Sun's magnetic field constantly changes - the Sun's polarity reverses every 11 years. This activity changes the number of sunspots on the Sun's surface - this then peaks at the 'solar maximum'. The Sun's activity cools areas on the Sun meaning they appear darker. The solar cycle can also cause small changes in the Sun's heat and light output. Some studies have shown some link between few sunspots and cold winters in Europe. Although it's unclear the Sun's cycle could influence our weather.
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