I have come to the conclusion that when there is a question as to whether or not it is going to be raining during my commute, I will listen to the local meteorologists predictions and assume the opposite will occur.
Three rides within the last week have proved the point. Two days (including today) we were told the rain was over and it came back in the middle of my ride. One day they said there was an 80% chance of rain so I rode and it was dry the whole day. Like I said last Friday, riding in light rain isn't that bad, but I need to get some appropriate gear.