The majority of customers don't like to see their windows cleaned in the rain and anybody who thinks different is
deluded, does that mean you shouldn't do it absolutely not.
For a start most wont even be at home during the clean and when they get home the last thing they will even think about is their windows.
I will only stop in conditions that I think will badly ruin the quality of the finished clean on the day or if I cant be bothered at the time, most times it because I cant be bothered and know I can make the time up working in more pleasant conditions, would I
advise a newbie not clean in the rain because it will ruin their reputation the answer is no.