Rain is just one more excuse not to mow the lawn. And a good one.
Other excuses acceptable to me:
-too cold
-too dark (works anywhere within two hours of sunset, or on overcast days in the right mode)
-aren't the damn kids supposed to mow this?
-I'll wait till it gets taller (good to about six inches in length)
-Let's go to the movies/dinner/etc. when prodded by spouse to harvest the hay crop
-lawnmower's on the fritz, I'll have to look at it sometime.
-just about any other excuse that comes to mind.
BTW, my house is not on House & Garden's hit parade. I am, however, working on a nice brush/compost pile that has all sorts of life in it.