What is feels-like temperature, and why is it different?
A thermometer shows one temperature, but conditions outdoors can feel significantly warmer or colder. The difference depends on how the body exchanges heat with its surroundings.
Air temperature versus feels-like temperature
Air temperature is a physical measurement. Feels-like temperature describes an estimate of the thermal effect of particular weather conditions on the human body.
The phrase is broad: different weather indices apply under different conditions. Two important examples are the heat index and wind chill.
Heat index: why humidity matters
Sweating helps the body release heat through evaporation. When humidity is high, evaporation becomes less effective and hot weather can feel more oppressive.
The National Weather Service uses the Heat Index to combine air temperature and relative humidity in warm conditions.
The standard heat index assumes shade and light winds. Direct sunshine may increase heat exposure, so the index does not describe every possible outdoor environment.
Two cities may have similar air temperatures, yet the more humid location can feel hotter because sweat evaporates less efficiently.
Wind chill: why moving air feels colder
Cold wind increases heat loss from exposed skin. As wind speed increases, a cold day can feel substantially colder than the thermometer alone suggests.
The NWS wind chill formula applies when air temperature is 50°F (10°C) or below and wind speed exceeds 3 mph (4.8 km/h).
At 0°F (approximately −18°C) with a 15 mph wind (about 24 km/h), wind chill is approximately −19°F (−28°C).
This describes the thermal effect of wind and cold on exposed skin, not a lower measured air temperature.
Can wind chill freeze objects below air temperature?
Wind can make an object lose heat faster, but wind chill alone cannot cool an inanimate object below the actual air temperature. Wind chill was developed to help describe human cold exposure.
What are the limitations?
Clothing, activity, direct sunlight, exposure time and individual circumstances affect how weather influences people.
Heat index and wind chill are useful indicators with different assumptions. Neither should be confused with other heat-stress measures, such as wet-bulb globe temperature (WBGT).
Using this information on ClimaCiudad
Check the available temperature, humidity and wind measurements together for a more complete understanding of current conditions.
Explore the current weather in Miami or its hourly forecast.
At present, a calculated feels-like value is not available for every city in our weather data. Missing data must not be displayed as zero or represented as a real observation.
Practical tips
- For hot weather, check humidity together with air temperature.
- Remember that direct sunshine can increase heat exposure beyond the standard heat index assumptions.
- During cold and windy conditions, protect exposed skin and follow official weather warnings.
- Use hourly forecasts to understand how conditions may change during the day.
Frequently asked questions
Is feels-like temperature measured directly?
Standard apparent-temperature indices are calculated estimates, not another direct reading of air temperature.
Does humidity always make it feel hotter?
The effect depends on conditions. The heat index is especially relevant during warm and humid weather.
Can I apply wind chill in summer?
The official formula should not be applied outside its defined temperature and wind-speed ranges.
For another useful explanation, read our guide to rain probability.
Official sources
This guide draws on National Weather Service educational materials about heat index and wind chill.