This project examines the role of amateurs and laypeople in shaping 19th-century Belgian meteorology. It challenges the conventional view that the public's skeptical reception of the first government forecasts reflects solely a lack of trust, by proposing that the contributions of 'lay experts' were pivotal in the evolution of meteorological knowledge. Because non-professional weather observers such as farmers, botanists, and physicians developed weather-reading skills, government projects had to manage the co-existence of diverse forms of weather knowledge. First, I will interrogate how meteorological and phenological networks were influenced by Enlightenment and revolutionary ideas that fostered democratized forms of knowledge creation. Second, I will explore the production and distribution of a range of meteorological tools, such as instruments and plants. Third, I will analyze how various societal groups gained expertise in making weather observations and predictions. Last, I will examine how the use of this varied palette of weather tools changed together with the demarcation of professional and amateur roles in meteorology. These research objectives will be studied through a multifaceted approach which combines intellectual, cultural, and material history. By analyzing the coproduction of nineteenth-century meteorological knowledge, this project aspires to both contribute to the history of meteorology and to the history of public trust in scientific expertise.