The temperatures outside are dipping, but that doesn't mean you should give up on your outdoor workouts. In fact, exercise outdoors is a great way to get in your daily dose of vitamin D and fight the winter blues. However, the chilly temps can come with some dangerous risks if you're not prepared. Learn how cold is too cold and tips for staying safe while exercising in chilly conditions.

How cold is too cold depends on several factors, including air temperature and wind chill. The coldest weather occurs during the winter, when the Earth's tilt away from the sun lowers the amount of solar radiation that reaches the surface. This also increases the speed at which the air cools, making it much colder. Wind and humidity play a role in how cold the weather feels, too.

If the wind chill is below -30 degrees, it can take just 10 minutes for your skin to freeze. That's why it's important to dress in layers. This includes wearing thermal underwear, turtlenecks and neck warmers to keep your core temperature warm. It's also crucial to cover all your exposed skin, wear gloves and a hat or buff to prevent hypothermia. And remember to drink water or tea and avoid consuming sugary sodas or alcohol.

When it's very cold outside, it's important to keep a close eye on children and infants. They are more prone to frostbite than adults. If you notice any signs of hypothermia, which include uncontrollable shivering, confusion and disorientation, it's time to head indoors.