Is there a way to track the weather patterns such as rain in the overworld for Ultra Sun?

Question

Title should say it all. I want to be able to have a chance to SOS chain for a shiny Pokemon such as Politoed, which you can encounter during an SOS chain if it is raining that wasn't from Rain Dance or Drizzle. Is there a way to track the weather patterns in Ultra Sun?

Answer 1

Yes. All the weather patterns in usum occur at specific times of the day

Source:

https://bulbapedia.bulbagarden.net/wiki/Rain#On_the_field
https://bulbapedia.bulbagarden.net/wiki/Harsh_sunlight#On_the_field
https://bulbapedia.bulbagarden.net/wiki/Sandstorm_(weather_condition)#On_the_field
https://bulbapedia.bulbagarden.net/wiki/Hail_(weather_condition)#On_the_field

Each of those links show which areas of the map has the weather condition and at what times they occur