What Is Apparent Temperature?
Apparent temperature, or feels-like temperature, measures how hot or cold it actually feels to the human body by combining air temperature, wind speed, and humidity. This calculator applies the Australian Bureau of Meteorology (BoM) formula: AT = T + 0.33×e − 0.70×ws − 4.
Strong winds accelerate convective heat loss from skin, making cold days feel even colder. High humidity prevents sweat from evaporating, making hot days far more uncomfortable. Together, these two factors explain why the same 25°C can feel refreshing or sweltering depending on conditions.
Results are displayed in 10 comfort levels — from extreme cold danger to heat stroke risk — helping you quickly decide on appropriate clothing or outdoor precautions.
Frequently Asked Questions
The Australian BoM formula: AT = T + 0.33×e − 0.70×ws − 4, where e is vapour pressure (hPa) derived from relative humidity, and ws is wind speed in m/s.
Wind increases convective heat loss (feels colder), while humidity suppresses sweat evaporation (feels hotter). Apparent temperature captures both effects simultaneously.
In calm conditions, only humidity influences the result. Drier air feels cooler relative to actual temperature; humid air feels closer to or above actual temperature.