With the help from @Rocodamelshekima I got the help to try get a value from json, and Better logic and so far it looks ok.
Problem is, that I can`t figure out to put in the right value.
The value is the temperature, marked with yellow and flow attached
For my own needs i added three tags in the call. First and second tags are the longitude and lattitude. This way i can update my place of beiing very easy. Third tag is the api key. Just for sure if they change the key.
First you have to make a flow to get the data from your weather service. This is the Get json Trigger object. In that flow you give this get request a name. For me it was Weerupdate12uur. You can give it any name you want, but with that name we can extract the variables in the next flow. In the following flow you call Weerupdate12uur and extract it into variables. You have to use better logic.
It is a bit trial and error how to. You could try