When spending time away from 4G there is only one way to get weather updates and that is Satellites.
But critical devices like an Iridium Go are best kept out of the weather and at the same time you need an aerial with clear view of the sky.
The external aerial kit for the Iridium is more money but is it well worth the expense, it not only gives you a better signal but keeps your Iridium Go inside, dry and safe whilst you download your weather.