This October has been a record cool autumn with no traces of an Indian Summer (late summer).
Here in Southern California, we did not need to use our air conditioner during October 2018!
This year, 2018, also sets a record as one having over 150 spotless days (solar sunspots) with well over 150 days and counting so far. By the end of December 2018, this figure could be close to 200 spotless days. Could we be heading for another Dalton Minimum? Could 2019 have even more spotless days? Time will tell.
Below are the recent solar cycles. While the Dalton Minimum occurred during the late 1790s to 1825, the Maunder Minimum occurred during the 1600s and early 1700s. Currently, it appears like our sun is copying the Dalton Minimum as the data from 1790 to 1810 seems consistent with the data from 2000 to 2018.
Look at this interesting analysis:
http://www.sidc.be/silso/spotlessThere are several other websites that discuss the Dalton and Maunder Minimum and other mini-ice ages.