Running in the rain means going fast throughout delightful release of suppressed emotions and cleansing yourself from negativity. Also, it means that some situation or person enforces you to run away from it into more relaxing environment. This has symbolic meaning of superpowers with which you have been awarded. It means that when you were looking for something special, you have got it. That will help you to solve a lot of future problems.
Additionally, it means that you are going to reach financial success very fast. Also, there might be professional award for your great job.
Alternatively, running in the rain symbolize your trying to wash quickly your body from past negative experiences.