Even though the cold weather is here, it's still important to stay hydrated. I would argue it's even more important in the winter than the summer. In the summer you're more likely to feel thirsty than you are in the winter.
Drinking water is one of the easiest and cheapest ways you have to improve your health. Our human bodies are 60% water and our blood is 90% water. Every organ and system in our body needs water to keep it working. We can last several weeks without food but only about three days without water.
Most people walk around dehydrated and don't even realize it. You don't have to feel thirsty to be dehydrated. Even mild dehydration causes skin breakdown and wrinkles, weight gain due to misinterpreted hunger signals, headaches, muscle fatigue, general fatigue, joint pain and many other symptoms.