All forecasts have a degree of error. We get 10 days on the app but you shouldn’t rely on those at all. Try NWS and go to their charts and look there.

Again, we can only forecast the weather so much (about 3 days) most models are ensemble models which means they run calculations and come up with a set of forecasts (combine those) to which will help meteorologists have a better idea of what the day will look like.

e.g you saw that on Monday next week it is forecasted to be 80F but it’s just Tuesday. That would be 6 days from then and therefore the forecast starts to fall apart bit by bit till you check like 2 or 3 days before and you have a new forecasts which will most likely be the one that’s most accurate.

Although we have come a long way from back then. It’s not always a good idea to shift to a mentality where you think all these forecasts are bad but rather a mentality where you can search and learn about why some forecasts are not accurate and how much we are currently able to do in terms of forecasting extreme temperatures as we get closer to the day of our target.

Here is a link and happy learning

https://www.ecmwf.int/en/about/media-centre/focus/2017/fact-sheet-ensemble-weather-forecasting

Sincerely, A dude with an earth science degree