Understanding 'Feels-Like' Temperature: A Guide for Non-Technical Users

When you check the weather forecast, you might notice a "feels-like" temperature alongside the actual air temperature. This value represents how the temperature feels to your body, considering factors like wind speed and humidity. Understanding this concept can help you dress appropriately and plan activities safely.

What Is 'Feels-Like' Temperature?

The "feels-like" temperature, also known as the apparent temperature, combines the actual air temperature with environmental factors that affect how we perceive heat or cold. In cold conditions, wind can make it feel colder than the actual temperature, while in warm conditions, humidity can make it feel hotter.

How Does Wind Affect 'Feels-Like' Temperature?

In winter, wind increases the rate at which heat is lost from your body, making it feel colder than the actual air temperature. This effect is quantified by the wind chill index, which calculates the combined effect of wind and cold on exposed skin. For example, at an air temperature of 30°F with a 20 mph wind, the wind chill temperature is approximately 17°F. (weather.gov)

How Does Humidity Affect 'Feels-Like' Temperature?

In summer, high humidity levels can make it feel hotter than the actual air temperature. This is because humidity slows the evaporation of sweat, reducing the body's ability to cool itself. The heat index combines air temperature and relative humidity to estimate the apparent temperature. For instance, at an air temperature of 90°F with 70% humidity, the heat index is about 105°F. (climate.umt.edu)

Why Is 'Feels-Like' Temperature Important?

Understanding the "feels-like" temperature is crucial for personal comfort and safety. It helps you dress appropriately for the weather, plan outdoor activities, and take necessary precautions during extreme conditions.

How Is 'Feels-Like' Temperature Calculated?

The calculation of the "feels-like" temperature depends on the season:

• In Cold Weather: The wind chill index is used, which factors in the air temperature and wind speed to determine how cold it feels on exposed skin. (weather.gov)

• In Warm Weather: The heat index is used, which combines air temperature and relative humidity to estimate the apparent temperature. (climate.umt.edu)

Can 'Feels-Like' Temperature Be Negative?

Yes, the "feels-like" temperature can be negative, especially in winter conditions with strong winds. This indicates a higher risk of frostbite and hypothermia, so it's important to take appropriate precautions.

How Can I Find the 'Feels-Like' Temperature?

Many weather forecasts and apps provide the "feels-like" temperature alongside the actual air temperature. This information can help you make informed decisions about your clothing and outdoor activities.

By understanding the "feels-like" temperature, you can better prepare for the weather, ensuring comfort and safety in various conditions.