I don't think it's unusual to have your weight vary that much between day and night, depending on how much you've eaten, how much water you've been drinking, etc. Heck, I can be up a couple pounds just between the time I get up and the time I finish breakfast.
I would suggest either:
A) Pick a time of day to weigh yourself and stick to just that.
B) If you want to weigh yourself in the morning and evening, do it for like a week to learn your natural body fluctuations. I weigh myself first thing in the morning and last thing at night, every day. So I usually know the range where my body will be the next morning, based on past history.
Congratulations on your 35lbs lost!!
Last edited by newleaf123; 05-08-2009 at 12:04 AM.