Why stevenson screen is raised above the ground?

A Stevenson screen is raised above the ground to ensure accurate and consistent measurements of meteorological data by preventing the influence of surface heat and moisture. This elevation helps to minimize the effects of nearby objects, such as buildings or vegetation, which can cause localized temperature variations. Additionally, being elevated allows for better airflow around the instruments, promoting more reliable readings of temperature and humidity. Overall, the height helps maintain the integrity of the data collected.