Both
Widget Weather (1.99 euro/dollar) and
BeWeather2 (2.99 euro/dollar) updated/fixed their apps/widgets and are now also fully iOS10 compatible woohoo
Both are almost perfect now.
Widget weather:
+ can set to not use GPS (saves battery usage)
+ shows today + 7 days ahead in widget
+ can choose between two forecast agencies
+ can show small rain bar for upcoming hours although not per minute like e.g.
Dark Sky - US only or e.g.
Buienalarm widget - NL only)
+ you can set the update interval
+ a lot of options (icons,colors, info to show in app/widget)
- lacks percentage chance of rain (does show mm though)
- you can't switch locations in the widget
BeWeather2:
+ shows both rain percentage and mm of rain for next three days
+ you can switch locations in the widget
+/- has a minute by minute rain forecast however only works for mainly US (e.g. not in the Netherlands)
+ a lot of options (icons,colors, info to show in app/widget)
- doesn't show rain mm for upcoming hours (does show percentage though)
- can only show today + next 3 days
- can't turn off the use of GPS
- you can't set the update interval
I also heard a lot of people about
Weather Line that also recently added a widget to their app but in my opinion the widget looks really limited if the screenshot and desciption covers everything.