Why isn't there a rainbow during most rain storms?

There are a few reasons why a rainbow may not be seen after a storm. If there are clouds blocking the sunlight, no rainbow will appear. Additionally, your location may interfere with your ability to see a rainbow because a rainbow is only viewable from certain angles. While it might be raining on you there may not enough humidity in the surrounding area to make a rainbow appear. Where I live (West Texas) we get rain but it may be so dry in the surrounding area that no rainbow appears.