Me, too! It's much easier to write when the sun's already down. Maybe that's one of the reasons it's harder for me to write during the summer? I'm OK with editing during the day, but it's rare that I can write. I can do it, but it's much harder than after sunset.
The worst is when I'm already half-asleep, I should've gone to sleep hour(s) ago, but there's still stuff wanting to be written. It's like I'm on autopilot and can't stop. I want to write AND sleep at the same time. When I start to nod or write with my eyes closed, that's when I usually stop. But I make sure to write a sentence or two of what's gonna happen next. My best ideas come half-asleep. Do you ever have that problem???