It isnt just the sunspot activity that determines this. Although that is thee major determination, there are other factors that come into play. For example. In 535, or so, there was one or two major volcanic eruptions that sent the earth into a major cool down.
There has been minimums that did result in cooling, they did not result in extra major upheavals in the weather. But add into that the fact that the earths oceans are starting to cool down, that is the major factor in massive climate upheaval.
But, like you stated, the solar cycles play a important part. Let a VEI 6 or 7 volcanic eruption happen and then...
About like Pinatubo did in the early 90s.
BTW the Iceland Volcano Laki erupted in the late 1600s? And although it was no more than a VEI 4, it went on for months and months and the result was so much gas in the atmosphere that it disrupted weather for years. Killed a hell of a lot of people.
JK, I'm moving south. Nice to find someone else that has seen the data.
Gotta go shovel snow now (really).