I've gone the first or second week of December the past 7 years. We've had highs of low/mid 80's to highs in the 50's. Last month was wonderful, the day we arrived it was only mid 60's, the next day mid 70's, then low/mid 80's the rest of the week. One trip, I think 2000, our arrival day was in the 70's but the rest of the week in the low 60's. When it's only 60's during the day, it gets cold at night. In 2003, we had some days in the 60's, we were glad that we brought ight winter coats and gloves for evenings, we finally wised up. So be prepared for warm or cold ahead of time and watch the forecast before you do your packing.