Yes, they can. Your body has to reduce heat loss when the temperature drops. Vasoconstriction (constricting the blood vessels) is a method that the body uses to accomplish this. Due to the constriction of blood vessels, the blood flow toward the surface of the skin reduces. Thereby, the heat escaping through the skin considerably goes down. Consequently, the blood pressure rises too. The kidneys pull out the excess water into the bladder in order to maintain pressure, which causes you to urinate more often.