Here are two examples, not necessarily the average, of bombing accuracy. These are two examples where PFF marked the target with Oboe. Neither target was completely cloud covered.
Stuttgart 15/16 March 1944
The outside ring is the 3 mile range from the aiming point
Berlin 24/25 March 1944
The outter circle is the 3 mile range from the aiming point
I am working on getting more bomb plot examples.