Finally repositioned my PWS....it has been reading high on sunny days as it was installed over large gravel bedding. Will see over the next few days if I am more in line with others in the area.
So looking forward to the frontal passage as wee sleep Saturday morning....
Do wooden privacy fences affect them? I am reading a little high but am over grass and a garden. It is in a corner though, about 7-8ft from the fence.
Anything that can give off heat during the day from radiational surface heating from direct sunlight or hold heat at night will affect the reading.
Ideal is an open grassy area...but living in a subdivision makes that difficult.
A fence probably isn't the worst thing to be near. The obvious things to avoid are concrete, buildings, non-organic bedding (like my large gravel), etc.
Even avoid placing it under a tree canopy.....it won't give a high daytime reading but will give a high nighttime reading on clear nights with good radiational cooling (the reason you don't get frost on a car marked under a tree).