From looking at these maps (click 'precipitation' tab: https://www.cpc.ncep.noaa.gov/products/precip/CWlink/ENSO/regressions/geplr.shtml  ), it looks like there is a signal for above-average precipitation for Paraguay during El Nino for this time of year (toggle over AMJ and MJJ in particular).  So it's very interesting to hear that it's been happening and thanks for letting us know.  We find that there isn't a strong association between the intensity of the impact and the strength of the El Nino.  Folks can get significant impacts even with very marginal El Nino situations... take the Philippines for another example-- they've shown clear signs of drought since the El Nino onset earlier this year.   Thanks again!