aeromancy
/ˈɛːrəmansi/noun
Divination by air or by things in the air (as clouds, birds, etc.); the practice of interpreting the weather or other atmospheric phenomena in order to predict the future.
- Sometimes passing into the idea of weather forcasting..
Origin
Late Middle English; earliest use found in John Gower (d. 1408), poet. From Anglo-Norman aermancie and Middle French ayromancie, aerimancie (1380; also as aéromantie, aeromance; French aéromancie) from post-classical Latin aeromantia (636 in Isidore, citing Varro) from aero- + -mantia.