How to prepare for fall lawn care?

See if these help you decide!

https://homeguides.sfgate.com/ok-mow-grass-wet-104532.html

https://www.bobvila.com/articles/mowing-wet-grass/

It is perfectly fine to let leave the grass clippings on the lawn.

Here is how to treat the lawn for moss.

https://homeguides.sfgate.com/kill-lawn-moss-dish-soap-41529.html

https://www.thespruce.com/how-to-get-rid-of-moss-in-lawns-2132201

I see many people mow wet grass, just make sure you clean up the underside of the mower since the wet grass will probably cause a sticky build up. Leaving the grass clippings on the lawn is no problem and will nourish the soil as it breaks down. If you cut the wet grass and it leaves clumps of cut grass, those will need to be picked up or broken up, the sun wouldn't be able to get through them and you may lose the grass underneath it. Sorry, I know nothing about treating grass for moss, we get a fairly good amount of rain in the summer, but I don't have a problem with moss, except in a few pots.

Call your local agricultural agent or ask for a Master Gardener for questions pertaining to your area. They have all the answers!

You can cut your grass when it's wet but it's very hard on your lawnmower. So you do need to clean it out after use or depending on lawn size during cutting. Leaving it on your lawn will act as a natural seeder but you may have to spread it around a bit as it will be in clumps. If you are getting moss then it is coming from the ground itself not being able to dry out. I have had this problem and the area where moss was growing was surrounded by trees so the area never got any sun and the ground was full of underground springs that kept the soil wet all the time. Perfect growing conditions for moss.