The time needed for the sensor to show the actual measured value is called Sensor Response Time. It is defined as the "5 x Time constant" of the sensor. Time constant definition can be found f.e.in Wikipedia: https://en.wikipedia.org/wiki/Time_constant
Sensor Time constant usually is stated in the datasheet. For example, Aranet4 Time constant = 100 seconds (see Aranet4 datasheet: https://cdn.bfldr.com/FS48XT6B/at/k9b9wjnv8f455crkp7846j/Aranet4_datasheet_WEB.pdf)
This means that if you move Aranet4 to the new location, you will get actual measured values in 5 x 100 = 500 seconds, t.i. ~ 8.3 minutes.