Oh, I know what you mean. I rake a lot of dead grass thatch out of our field, and the warm spell a couple of weeks ago was PERFECT for that. Bugs weren't out yet, sun was warm, breeze was cool, and this year's grass hadn't started growing much yet.
Sometimes I weed on my hands and knees, working my way down the fence. I get a lot done when the ground is damp enough to pull the weeds, but not soaking wet and cold.
I haven't seen any grubs yet. I don't know if it's too early, or if my war against Japanese Beetles was so ferocious that I got most of the beetles and they didn't lay eggs to make grubs. Either way, it's a win for me: No grubs = good for the garden. Grubs = free food for the chickens. Same with the beetles.