Although the daytime is warming up, I'm finding I still reach for a sweater on rainy or windy days and oftentimes in the evenings. I love the look of a simple light colored sweater like I wore here, here and here. Sweaters pair really nicely with shorts, jeans and you can easily layer one over a dress for added comfort.
For Spring, I like simple nude or blush colored ones. Also, pale blue, lavender and a crisp white looks perfect for those chilly moments. They will transition nicely later in the fall with the change of a shoe (an over the knee boot or dark colored loafer) and a jacket. But, for now - feel free to carry one with you for those cool crisp nights.