The global temperatures and weather cycles are mainly related to the sun.

Lol, no the fuck they aren't. We've been directly measuring solar output directly for decades now. The main fluctuations are the 11-year cycle, but overall output has actually decreased slightly, and is expected to decrease a bit more for a while as the evidence indicates that we might be entering a Grand Solar Minimum.

But these are small fluctuations, on the order of tens or hundredths of a percent of total output. While this would slightly reduce the overall temp increases we're seeing from the strengthened greenhouse effect resulting from all the greenhouse gases we're putting into the atmosphere (mainly CO2), the ~1C warming we've seen over the last century is most certainly not because of the sun.