The Maunder Minimum is the name used for the period roughly spanning 1645 to 1715 when sunspots became exceedingly rare. During the Maunder Minimum global temperatures were lower than average.
In the same way, during the Dalton Minimum (~1790-1840) global temperatures were lower than average.
NASA (2/8/12) has released their predictions for sunspot numbers for August. (LINK)
The current prediction for Sunspot Cycle 24 gives a smoothed sunspot number maximum of about 60 in the Spring of 2013. We are currently over three years into Cycle 24. The current predicted size makes this the smallest sunspot cycle in about 100 years.