I searched a bit and seems like the answer is no besides this web app https://deepmind.google.com/science/weatherlab

> WeatherNext 3 will power weather features in Google Search, the Gemini app and Google Maps, as well as the Google Maps Weather API and Google Earth Engine.

https://dataconomy.com/2026/09/04/weathernext-3-ai-forecasts...

So I assume the main way would be googling "weather Los Angeles" and it will be powered by the WeatherNext 3 models

They also open sourced the last one and are doing B2B/enterprise arrangements so maybe other weather apps are experimenting with it.

Mobile app would be awesome.

Last time they have only shipped the model on web in mobile...