Breezy Weather will effectively run offline. It syncs fairly regularly but if it can't update, it will still show the latest results it got and how long ago it was fetched. You can fully control your weather sources and locations, there's decent widgets, fully open source, can be installed from fdroid or using Obtainium.
Weather and Meteorology
Hope to expand on this later. A community for discussing the weather (very UK), amateur meteorology, and moaning it's too hot/cold/wet/dry/mild.
Thanks for the tip. Someone suggested the Breezy Weather app but it seems to only cover the current day. I need several days.. ideally a week ahead.
(edit) Sorry, I was wrong.. The daily forecast goes 4 days out. That’s good enough.
The daily forecast goes as far as the weather provider provides. Try different providers and see which ones have more days.
It turns out I was in fact getting 10 days ahead with the default weather source. I just did not realise it because I didn’t know the daily forecast scrolls further to the right.
Anyway, I’m sorted.. thanks!
While I use a couple weather apps, I also use Widgetify to grab the NOAA website for my region. This keeps a widget on the home screen with multiple days on it.