Bill wrote:
"When transmitting what effect does moisture and / or precipitation
have on various kinds of antennas---?"

I worked off and on for 10 years in a medium wave broadcast station with
a 4-tower directional array (separate day and night patterns) fed by
open-wire 6-wire skeletal coax.
Every half hour we recorded the sampling loop currents associated with
each tower and the phase relationships between the towers using an RCA
WM-30A phase monitor. Precipitation and fog didn`t amount to a hill of
beans in nearly all cases. Currents and phases were nailed in place.

Best regards, Richard Harrison, KB5WZI