My prediction for today was: 7˚ or more below normal (meaning 68˚ or colder)
Actual High at IAH today: 65˚ (10˚ below normal)
Looks like I was right on this one and will not have to eat crow!

Now though it is time to wait and see how my low-temperature prediction goes tonight. In the update I made last weekend, I called for 5˚ or more below normal on Wednesday night (meaning 47˚ or colder). The current forecast calls for upper 40s to near 50˚ (due to the expected remaining cloud cover)...so it will be a very close call.
Update (made at 3pm 11/8/07): My prediction for lows completely busted. Had the clouds cleared, I would have been correct, but since they stuck around we were only about 2˚ cooler than normal last night and not 5˚+ like I had originally predicted.