The invention relates to a precision scale having a weighing chamber (16), a wind shield, which surrounds the weighing chamber (16), an air-conditioning module (34), which is arranged removably in the weighing chamber (16), a processor (32), which is arranged in the precision scale, a data input unit, which is arranged on the precision scale, and a data transmission link, by means of which data can be exchanged between the air-conditioning module (34) and the processor (32). The invention further relates to an air-conditioning module for detachable electrical coupling to a precision scale, wherein the air-conditioning module (34) forms a closed structural unit and has an air pressure sensor (62), a humidity sensor (54), and an air temperature sensor (52), and also relates to a part of a data transmission link, via which data can be sent to a processor outside the air-conditioning module.