If you do not have a sister and dream that you have one, then it signifies feminine qualities that you need to activate or acknowledge within your own self. Pay attention to the actions and behavior of your dream sister.

To see and hear rain falling symbolizes forgiveness and grace. Falling rain is also a metaphor for tears, crying and sadness. Alternatively, rain symbolizes fertility and renewal. If you get wet from the rain, then it indicates cleaning from your troubles and problems.

To see an umbrella in your dream symbolizes emotional security. You are putting up a shield against your emotions and are trying to avoid dealing with them. If the umbrella is leaking, then it indicates that you are unprepared with facing your problems. 

To see or receive a ring in your dream symbolizes emotional wholeness, continuity, commitments and honor. If the ring is on your finger, then it signifies your commitment to a relationship or to a new endeavor. You are loyal to your ideals, responsibilities, or beliefs.

To dream that you are walking up a flight of stairs indicate that you are achieving a higher level of understanding. You are making progress into your spiritual, emotional or material journey. The dream is also analogous to material and thoughts that are coming to the surface.