Well, yes, it is possible for your eyes to change color with weather. Generally speaking, there are many factors which can lead the eye color changes. For example, your eye color can be changed with the weather, emotion. Your eye color can change due to the weather. For example when it is really sunny outside and the sunlight hits your eyes, it can cause your eye color to become brighter. Also, when you are sad, concerned, worried, and have cried, the color of your eyes will become light grey and light blue. By the way, color change in your eyes is caused by blood pressure. So when you are clam, your eyes' color can change to grey. For the weather, your eye color can change. And you should not be too worried about it.