Cold Weather Facts: The Truth Behind 7 Common Winter Myths

Winter is a season surrounded by folklore and age-old advice passed down through generations. From how to stay warm to how to avoid getting sick, we’ve all heard tips that sound true. But are they? You clicked to learn the truth behind these common winter beliefs, and this guide is here to deliver, separating scientific fact from fiction.

Myth 1: Being in the Cold or Having Wet Hair Gives You a Cold

This is perhaps the most repeated winter myth of all. The idea that you’ll catch a cold simply by going outside without a jacket or with wet hair is deeply ingrained in our culture. However, it’s not scientifically accurate.

The Reality: The common cold and the flu are caused by viruses, not by cold temperatures. You get sick when you are exposed to a virus, typically from another person who is infected. The reason illnesses like colds and flu are more common in winter is because people spend more time indoors in close proximity to one another, which makes it much easier for viruses to spread from person to person.

Cold, dry air can also play a role. It can dry out the mucous membranes in your nose, making it slightly easier for viruses to take hold. Furthermore, some studies suggest that our immune response may be slightly less effective in colder temperatures. The key takeaway, however, is that temperature itself is not the cause. You need to be exposed to a virus to get sick.

Myth 2: You Lose Most of Your Body Heat Through Your Head

“Wear a hat! You lose 80% of your body heat through your head!” This is a classic piece of parental advice, but the number is wildly exaggerated.

The Reality: This myth likely originated from a flawed military study from the 1950s where subjects were dressed in cold-weather survival suits but wore no hats. Naturally, most of their heat loss was from their uncovered heads.

In truth, you lose body heat from any part of your body that is exposed to the cold. Your head only accounts for about 10% of your body’s total surface area, so the heat loss is roughly proportional to that. You would lose a similar amount of heat if you went outside without a glove on one hand or wore shorts. The lesson isn’t that your head is a special heat chimney, but that you should cover all exposed skin to stay warm in the cold. A hat is still an excellent idea, just not for the reason most people think.

Myth 3: Drinking Alcohol Warms You Up

A shot of brandy or a hot toddy might feel like it’s warming you from the inside out on a frigid day, but this warming sensation is dangerously misleading.

The Reality: Alcohol is a vasodilator, which means it causes your blood vessels, particularly the small capillaries near your skin’s surface, to expand. This brings more warm blood to your skin, which is why you feel a flush of warmth. However, this process is actually drawing heat away from your vital organs and core.

By rushing warm blood to the surface of your skin, alcohol actually causes your core body temperature to drop faster. That feeling of warmth is your body losing heat to the cold environment. Relying on alcohol to stay warm in freezing conditions can increase your risk of hypothermia. A truly warming drink is something non-alcoholic, like hot chocolate or herbal tea.

Myth 4: You Don't Need Sunscreen in the Winter

When the sun feels weaker and the days are shorter, it’s easy to think that sunscreen is only for summer beach days. This is a dangerous misconception that can lead to significant skin damage.

The Reality: The sun’s ultraviolet (UV) rays are present all year round. While UVB rays, which cause sunburn, are less intense in the winter, UVA rays, which cause premature aging and contribute to skin cancer, remain potent.

What makes this myth even more dangerous is snow. Fresh snow can reflect up to 80% of the sun’s UV radiation. This means you can be hit by the same rays twice: once from the sun and again from the ground. This is why skiers and snowboarders can get severe sunburns, especially on their face and under their chin. Always apply a broad-spectrum sunscreen with at least SPF 30 to all exposed skin before heading outdoors in the winter.

Myth 5: Every Snowflake is Unique

The idea that no two snowflakes are alike is a beautiful and romantic notion. While it holds up for the most part, it’s not an absolute scientific law.

The Reality: It is extremely unlikely that you will ever find two complex, identical snowflakes. A typical snowflake is made of about 10 quintillion (10^18) water molecules, and the exact path it takes through the clouds, with varying temperatures and humidity, determines its final intricate shape. The number of possible arrangements is astronomically large, making the odds of two being identical virtually zero.

However, in 2015, a scientist in a lab was able to grow two nearly identical “twin” snowflakes under controlled conditions. Furthermore, at the very beginning of their formation, simple, primitive snow crystals can be very similar before they develop their complex branches. So, while it’s true in a practical sense, it’s not an absolute fact.

Myth 6: It Needs to Be Below Freezing (32°F / 0°C) for It to Snow

We associate snow with freezing temperatures, so it seems logical that the air temperature has to be at or below 32°F (0°C) for flakes to fall.

The Reality: It’s possible for it to snow even when the ground temperature is as high as 40°F (about 4.5°C). Snow forms high up in the atmosphere where the temperature is well below freezing. As the snowflakes fall, they travel through warmer layers of air. If the snowflake is large enough and the layer of warm air near the ground is not too thick, it can reach the surface before it has a chance to melt completely. This often results in large, wet, heavy snowflakes that are perfect for making snowballs.

Myth 7: Bears Hibernate All Winter

We often use the word “hibernate” to describe the deep, continuous sleep of bears during the winter. While they do sleep for long periods, it’s not true hibernation in the strict scientific sense.

The Reality: Animals that are true hibernators, like groundhogs or bats, enter a state of suspended animation. Their body temperature drops dramatically, their breathing and heart rate slow to almost a complete stop, and they are very difficult to wake up.

Bears, on the other hand, enter a state called “torpor.” While their heart rate and breathing do slow down, their body temperature only drops by about 10 degrees. They do not eat or drink, but they are able to wake up relatively quickly to defend themselves or their cubs from a threat. This is a crucial survival adaptation that separates them from true hibernators.

Frequently Asked Questions

Why do we get sick more often in the winter if the cold isn’t the cause? As mentioned, it’s primarily because we spend more time indoors, closer to other people, which facilitates the spread of viruses. Dry indoor heating can also dry out our nasal passages, making us more susceptible to infection.

What is the best way to stay warm in the cold? The key is layering. Wear multiple thin layers of clothing rather than one thick one. This traps air between the layers, which acts as an excellent insulator. Always cover exposed skin, including your hands, neck, and head, to prevent heat loss.