Today the sun has been spotless for the fourth day in a row since March 3, 2018.
So far, the average Estimated International Sunspot Number for March averages slightly more than two.
During this solar minimum, the average monthly means for International Sunspot Numbers (ISN)
have been plunging rather dramatically, while the monthly number of spotless days has been
increasing according to the monthly Sunspot Bulletin published by Belgium's Royal Observatory:
Month Year ISN Spotless Days
Feb. 2018 #10.6 with 12 days
Jan. 2018 #06.7 with 15 days
Dec. 2017 #08.2 with 16 days
Nov. 2017 #05.7 with 19 days
Oct. 2017 #13.2 with 11 days
Sep. 2017 #43.6 with 00 days
Aug. 2017 #33.1 with 00 days
Jul. 2017 #18.3 with 11 days
Jun. 2017 #19.4 with 04 days
May 2017 #18.8 with 07 days
Apr. 2017 #32.6 with 04 days
Mar. 2017 #17.7 with 16 days
Feb. 2017 #26.1 with 00 days
Jan. 2017 #25.8 with 08 days
Dec. 2016 #18.9 with 06 days
Nov. 2016 #21.4 with 00 days
Oct. 2016 #33.6 with 01 days
Sep. 2016 #44.7 with 00 days
Aug. 2016 #50.7 with 01 days
Jul. 2016 #32.5 with 05 days
Jun. 2016 #20.9 with 09 days
May 2016 #52.1 with 00 days
Apr. 2016 #30.8 with 00 days
Mar. 2016 #54.9 with 00 days
Feb. 2016 #57.2 with 00 days
Jan. 2016 #56.6 with 00 days.
cf. http://www.sidc.be/silso/sunspotbulletin
Totals for Solar Cycle 25 during this solar minimum as published by Belgium's Sunspot Bulletin.
2018 total: 27 spotless days (average per month = 13.5) - this figure does not include spotless days in March 2018
2017 total: 96 spotless days (average per month = 8.0)
2016 total: 22 spotless days (average per month = 1.83 ); the 10th spotless day occurred in June 2016
2015 total: 00 spotless days (average per month = 0.0)
2014 total: 01 spotless day (average per month 0.08); this spotless day occurred on July 17, 2014
Grand total: 146 spotless days for the new solar cycle 25
According to the data provided on the website of http://www.spaceweather.com
2018 total: 31 days (47%)
2017 total: 104 days (28%)
2016 total: 32 days (9%)
2015 total: 00 days (0%)
2014 total: 01 day (<1%)
Grand Total: 168 spotless days for new solar cycle 25
Notice that spaceweather.com provides a figure that is 22 days higher than the spotless days noted by Belgium.
This is due to the fleeting nature of the sunspots located on the sun. Then, too, Belgium is located in the Northern Hemisphere not too far from the polar regions. With more cloudy days obscuring the vision of the sun, Belgium would have fewer days to observe the sun.