I know i have raynaud's and it's a primary condition for me. why do i only have problems in the winter?

Cold temperatures: Raynaud's phenomenon is often caused by cold temperatures. The vasospasm occurs when one's hands, feet, and face are exposed to cold. In the northern hemisphere, winter is the coldest season.

The temperature: Raynaud's symptoms are typically triggered by cold temperatures. Many people with raynaud's only have symptoms during the colder months.