Tool description

Calculate what the weather actually feels like based on temperature, humidity, and wind conditions. This tool uses scientifically accurate heat index and wind chill formulas to determine the apparent temperature that your body experiences.

Features

  • Heat Index Calculation - Accounts for how humidity makes hot weather feel even hotter
  • Wind Chill Calculation - Determines how wind makes cold weather feel colder
  • Dual Temperature Units - Switch between Celsius and Fahrenheit
  • Dual Wind Speed Units - Choose between mph and km/h for wind speed input
  • Real-time Results - Instant calculations as you adjust values
  • Weather Condition Labels - Descriptive labels from "Extremely Cold" to "Extremely Hot"
  • Input Validation - Ensures humidity stays between 0-100% and wind speed is valid

Use Cases

  • Planning outdoor activities and determining appropriate clothing
  • Understanding weather forecasts more accurately
  • Assessing heat stress or cold exposure risks
  • Comparing actual vs. apparent temperatures for safety decisions
  • Educational purposes for learning about meteorology

What is Apparent Temperature?

Apparent temperature (feels like temperature) is what the air temperature feels like to the human body, taking into account factors like humidity and wind that affect our perception of hot and cold.

Heat Index: When it's hot and humid, your body has difficulty cooling itself through perspiration evaporation, making it feel hotter than the actual temperature.

Wind Chill: In cold weather, wind removes the thin layer of warm air around your body, making you lose heat faster and feel colder than the actual temperature.

Calculation Details

  • Heat Index Formula: Applied when temperature ≥ 80°F (27°C) and humidity ≥ 40%
  • Wind Chill Formula: Applied when temperature ≤ 50°F (10°C) and wind speed > 3 mph
  • Moderate Conditions: When neither formula applies, feels like equals actual temperature