Odds of circular rainbow appearing twice in less than a week?

Today, Saturday, there is another circular rainbow surrounding the sun here in NE CT. We also had a circular rainbow on Tuesday (I got a nic pic of that one). The sky was clear on Tuesday, today we've got "hazy" clouds and it's pretty humid. Are circular rainbows fairly common or is this twice in one week occurrence pretty strange?

UALog2010-05-24T22:00:57Z

Favorite Answer

They are common in places where you have a lot of very high clouds that are made up of ice crystals.