From what height can you jump there? I'm not going to recommend trivial things like seeing the Burj Khalifa or the fountains, what I liked most there was spending a night with the Bedouins in the desert, which I found out about on getexperience. I saw a review of the weather in all seasons on their blog. Read about
Dubai weather February , maybe they mention it. I also recommend visiting Abu Dhabi if you're going to the UAE. I booked a trip there on their website, and the tour already included the Sheikh Zayed Grand Mosque, Qasr Al Watan Palace and several other locations.