It rains all the time a lot in Cornwall - so I'm quite lucky that most of my customers are both used to rain - and now to me cleaning in the rain.
I've got a few that I leave out if it's bad - can count them on one hand.
Today it was a clear blue sky - then next minute - grey cloud and torrential rain for 30 minutes - followed by clear sky again. Still got my work done and home before dark.
Worst thing for me is starting work in the rain, especially as I have to walk past my coffee machine