Hello, the cold weather effects the circulation and hot weather maks it more painful. I have RSD/CRPS in my right lef, foot and hip and it is always colder than the other leg no matter the weather temperature. My foot will get extremely cold and blue. A good way to help is to get in a bath but gradually warm the water because if you get in the water when it is hot and your foot is really cold, it will burn even if it's not too hot for the unaffectd area. the water helps witht he circulation and the slow increase in water temp will help too. Hope that helps