El Niño Weather and Saturn in Mutable Signs

Forecasters are predicting an El Niño weather pattern for the upcoming season so I looked up the history of El Niños of the past. Haven't done much investigation here but did notice that Saturn passing through mutable signs did occur in 4 out of 6 of the most recent strong seasons.  Saturn will be moving into Sagittarius this year and the last 2 times this occurred there was a strong grade El Niño.

http://ggweather.com/enso/oni.htm

1957-58 Saturn in Sagittarius

1965-66 Saturn in Pisces

1972-73 Saturn in Gemini

1982-84 Saturn in Libra and Scorpio

1987-88 Saturn in Sagittarius

1997-98 Saturn in Aries