When will spring appear?

We were teased with spring last week, the snow had melted, the roads and sidewalks were clear and dry. I thought I'd be getting back outside regularly now. This week a dentist appointment kept me inside on Monday, then the weather became not-spring. Wednesday and today, I was inside. Tomorrow I want to get outside even if only for a part of the run. I'm feeling frustrated but I know that the snow will melt, the temps will rise and I'll be out regularly.