I also kno a chap at the slighest hint of rain or the very fine drizzle we get, will pack up n call it a day. Its like trying to find any excuse NOT to work..
I dont think im alone in saying, that in the past ive seen the forecast and decided against working (when i cleaned old school (trad)) and so made completely different plans. Only for the day to have been nice and miss out on a days wage n fall day behind in work. Since doing that a couple of times over the years, i soon learnt to look out the window and if dry, then it was off to work. If it rained, sat it out in car and decide if it was in for rest of day or not.
Now on wfp, its every work day is a work day, unless its really bad weather and quite frankly if i want to be in it all day. Not, what would customers think.