Should you mow wet grass? In an ideal world it would be avoided. However, many people are just too busy to mow their lawn only when the weather is good. If the grass needs mowing, the weekend may be the only opportunity you get - even if it means cutting wet grass.
March and April pose the biggest problem. These two months, in the UK at least, see the greatest grass growth and can often be wet. The wetter it gets, the longer the grass grows. So is it OK to mow wet grass? With the correct equipment... yes it can be.