From the SIDC (World Data Center for the Sunspot Index):
Provisional International Sunspot Numbers
Provisional International monthly mean Sunspot Number for
May 2013 : 78.7 (seventy-eight point seven)
Maximum : 135 on 16 // Minimum : 33 on 31
Provisional daily International Sunspot Numbers for May 2013 :
1.. 93 6.. 71 11.. 88 16..135 21.. 74 26.. 63 31.. 33
2.. 68 7.. 76 12.. 93 17..120 22.. 86 27.. 60
3.. 64 8.. 80 13..100 18.. 87 23.. 71 28.. 51
4.. 80 9.. 76 14..105 19.. 83 24.. 71 29.. 47
5.. 72 10.. 82 15..113 20.. 73 25.. 77 30.. 48
72 cooperating stations on June 1, 09 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for November 2012 : 59.7 (+-5%)
SM CM SM CM SM CM
2012 Dec 58 60 2013 Jun 53 75 2013 Dec 48 88
2013 Jan 57 63 Jul 52 78 2014 Jan 47 87
Feb 57 66 Aug 51 81 Feb 46 86
Mar 56 69 Sep 50 83 Mar 46 85
Apr 55 70 Oct 50 86 Apr 45 84
May 54 72 Nov 49 87 May 44 83
SM : SIDC classical method : based on an interpolation of Waldmeier's
standard curves; the estimated error ranges from 7% (first month) to
35% (last month)
CM : Combined method : the combined method is a regression technique
coupling a dynamo-based estimator with Waldmeier's idea of standard
curves, due to K. Denkmayr.
ref. : K. Denkmayr, P. Cugnon, 1997 : "About Sunspot Number Medium-Term
Predictions", in "Solar-Terrestrial Prediction Workshop V", eds.
G. Heckman et al., Hiraiso Solar Terrestrial Research Center, Japan, 103