I was in Aruba from 7/1/05-7/8/05, and I remember it raining on Tuesday the 5th because that was the day my family and I went scuba diving. It was lightly raining so we called the scuba company before we left our hotel for our scuba adventure, and when we got to our diving spot, it had stopped raining.
DON'T WORRY ABOUT THE RAIN! It normally doesn't rain all day. The best part is that Aruba is great rain or shine. There are many things you can do it you do have a rainy day. ENJOY ARUBA!!!