Freddie wrote:

This puzzles me, as I would imagine the copper of a standard rain
gauge would become much cooler than the plastic of a Davis rain
funnel, and consequently experience more condensation.

The funnel of my VP2 often seems to be wetter than the copper gauge on
dewy mornings. I use the copper gauge for my records. I use the
measurements from the VP2 to apportion the total amount captured in the
copper gauge into daily totals days anytime that I am away for two or
more days.

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.