I'm missing the option in all the currently released iOS14 weather widgets (Forecast Bar, Carrot Weather, Weather Channel, The Weather Network) to show both percentage and amount of precipitation per hour and per day and a minute by minute in one view. I'm a big fan of
Forecast Bar which does have a widget that can change from hourly to daily view and into precipitation view (when it will start raining soon) and has some options to change in the widget when you long press on it (but not what you are asking here) but I would rather see all three in one widget. You can ofcourse have separate widgets installed but that takes up so much space on either homescreen or widget area (NC).
The way
Partly Sunny currently does is the best I think but that only has Dark Sky as weather source and hasn't been updated for iOS14 yet so is only available in Notification Center as a widget (besides being an app). Other detailed widgets/apps out there that I also hope to see become available with an iOS14 homescreen widget are
BeWeather3 (still also only Dark Sky as weather source) and
Hello Weather which all have lost of options to customize currently but I do wonder if they can still offer these with iOS14 homescreen or if this can no longer be done since the original NC widget were more customizable I think (less Apple restrictions).