For reasons I do not remember we choose the Open Meteo REST-API to document the development of special agents. So, if you want to monitor the outside temperature at your place (in big cities typically a few hundred meters from the coordinates specified), head to the Exchange and download the special agent.
There are no upper thresholds (we wanted to show how to implement special agents and since writing took place in February and March only added crude lower thresholds), but at least metrics are shown: