Rainy days are best when you sleep in

I am thankful for occasionally being able to sleep late. Most days I get up at 4 AM or 5 AM, and rarely as late as 6 AM. Then on Sunday mornings I might wake up at 5:30 to check the temperature and rain gauge, then slip back into bed and sleep till 8 AM or even 8:30 AM. Ah, it is deliciously decadent! I know in theory that I would be better off to go to bed and rise every day at the same times. I am not sure why I enjoy the sleeping in till 8, when its not cloudy the sun shinning outside will usually wake me up. I can just check the time, roll over and go back to sleep. Breakfast can wait a little longer.