A common symptom of cold weather is its effect on urine
production. Exposure to cold causes a reduction in blood flow to the surface of the skin by constriction of blood vessels. This reduces the overall volume of the circulatory system so increasing the blood pressure. The body's response to this is to reduce the fluid volume by getting rid of water in the
urine. So when you get cold, you want to pee
in the summer we sweat it off instead, if say i feel a little bit like peeing but am on a lengthly bike ride i don't stop to take a leek by the time i get home i don't need to go any more if anything