What is the daily maximum temperature in the weather report in the weather forecast? Is it outdoors or indoors? Is it the temperature where the sun shines directly?

This is uniformly stipulated by the World Meteorological Organization:

It is measured in a louver. The louvers are placed on lawns that are protected from direct sunlight, wind, rain and natural ventilation. The thermometer is placed in the louver box and the data is measured 1.5 meters above the ground. This is a standard uniformly stipulated by the World Meteorological Organization. It represents the undisturbed standard air temperature in a natural state. Usually the air temperature in the weather forecast represents the air temperature in nature.