Problem is the choices on that site are either 1950-2010 or 30 year periods, essentially. There is no 1950-2025 option. But regardless, all maps show the same basic thing: first year Ninos don't have any real dry signal for mid summer. Also, I filtered specifically for developing first year moderate or greater Ninos, which is not the same as your map.

^More big +AO this May-June for the 3rd straight year, since the Solar aurora borealis

Forecast from 5/22, EPS on top and AI-EPS on the bottom Now what is likely to verify. This picture doesn't change substantially for other models. Looks like the AI won this round:

Yeah, June has a stronger STJ signal. Some maxes over 0.3 for a 73-year base period is slightly statistically significant.

A seasonal correlation coefficient of 0.1 to 0.3 isn’t statistically significant though. It looks like the influence is weak or dependent on the structure of the ENSO/general circulation evolution (which varies widely between ENSO events).