Statisically, November has the least amount of rain out of any month in Orlando. The monthly average is very low. That being said, it DID rain about half the time during our last trip which was the week before Thanksgiving. I'm thinking it was just a fluke. But the downside is that when it does rain, it's a steady long-lasting rain, and not the pop-up quick thunderstorm you see in the summer. The humidity is lower in November.
Otherwise, we wore hoodies at night and were comfortable (not sweaty) in short sleeves during the day. Finding pool time was a challenge between the overcast and cooler temps, but we did manage to get one full morning in at the pool. We're going the same week this year.