Heat Index Calculator: Safety Tips for High Humidity
The Heat Index, also known as the 'apparent temperature,' is what the temperature feels like to the human body when relative humidity is combined with the air temperature.
When humidity is high, the evaporation rate of sweat from the skin decreases. Since sweat evaporation is the body's primary way of cooling itself, you feel much hotter and are at a higher risk of heat exhaustion or heat stroke.
Use this tool to plan outdoor workouts or work schedules during peak summer months to stay safe and hydrated.
Frequently Asked Weather Questions
What is the difference between Heat Index and Humidity?
Humidity is the amount of moisture in the air. Heat Index is the resulting 'felt' temperature when that moisture prevents the body from cooling via sweat.
Can wind chill be higher than the air temperature?
No. Wind chill only defines how much faster heat is being removed. It will always be equal to or lower than the actual air temperature.
What dew point is considered 'dry'?
A dew point below 50°F is usually considered comfortable and dry. Below 30°F, the air can feel very dry, potentially causing skin irritation.
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