Feels Like Temperature Calculator
This tool calculates the “feels like” temperature based on scientific principles, using either the Heat Index, Wind Chill, or a general formula that combines temperature, humidity, and wind speed.
The actual air temperature in degrees Celsius.
The actual air temperature in degrees Fahrenheit.
The amount of water vapor in the air, represented as a percentage.
The speed at which air is moving, measured in meters per second.
Factors in the "feels like" temperature calculation include the air temperature, relative humidity, and wind speed. These variables are combined to estimate how hot or cold it feels outside under specific conditions.
Calculation Details
Heat Index (°F)
Used when the temperature is 80°F (27°C) or higher, the Heat Index combines temperature and humidity:
Formula:
HI = -42.379 + 2.04901523 × T + 10.14333127 × RH - 0.22475541 × T × RH - 6.83783 × 10-3 × T2 - 5.481717 × 10-2 × RH2 + 1.22874 × 10-3 × T2 × RH + 8.5282 × 10-4 × T × RH2 - 1.99 × 10-6 × T2 × RH2
Where:
- T = Temperature in Fahrenheit
- RH = Relative Humidity (%)
Wind Chill (°F)
Used when the temperature is 50°F (10°C) or lower, combining air temperature and wind speed:
Formula:
WC = 35.74 + 0.6215 × T - 35.75 × (Wind Speed)0.16 + 0.4275 × T × (Wind Speed)0.16
Where:
- T = Temperature in Fahrenheit
- Wind Speed = Wind speed in miles per hour (mph)
General Apparent Temperature (°C)
Used for temperatures between 50°F and 80°F (10°C and 27°C), taking into account temperature, humidity, and wind speed:
Formula:
AT = T + 0.33 × E - 0.7 × Wind Speed - 4
Where:
- T = Temperature in Celsius
- Wind Speed = Wind speed in meters per second (m/s)
- E = Water vapor pressure, calculated as:
E = (Humidity / 100) × 6.105 × exp((17.27 × T) / (T + 237.7))
Where:
- Humidity = Relative Humidity (%)