Keep precipitation for 10 days in an array or fifo queue with 10 places and add a new value every day


You can use the JSON handler app for handlering jsons.

But even in the BetterLogicLibrary you can use arrays.
Just place [1,2,3,4] in a variable for instance.
Now, use the BLL expression cards and place the variable containing the array in it, plus [0] behind it, and you will recieve the fiest element in the array.

BLL alows predefined functions, so you can create push functions for instance.