aeromancy
Divination by use of atmospheric conditions.
uncountable
"If these apparitions are in the Ayre, then it is called Aeromancie." -- Astrologaster, J. Melton, 1620
Where it comes from
From Middle English aeremance, aermancye, aaeromancye, from Anglo-Norman aermancie and Middle French aerimancie, aeromance, ayromancie (modern French aéromancie), from Latin āeromantia. By surface analysis, aero- + -mancy.
Adapted from the Wiktionary entry aeromancy (CC BY-SA 4.0).