Heat Index & Category Calc

Check heat index, NOAA weather, and nearby stations in seconds. Compare risk bands, switch units, and see what the air really feels like before you head out every time.

• Featured by Apple App Store in Weather > What’s Hot for the iPad in 108 countries.

Heat Index & Category Calculator is a straightforward weather app for checking how hot it really feels when temperature and humidity climb.

It gives you a quick answer without making you dig through charts or guess at the risk.

• Calculate heat index from air temperature and relative humidity.
• See the result in both Fahrenheit and Celsius.
• Pull current NOAA weather for your location.
• Load the five closest NOAA stations and switch between them.
• View station observations and forecast details.
• Compare military, OSHA, NOAA, and athletic heat bands.
• Keep inputs saved locally so repeat checks are fast.
• Use manual entry when you already know the numbers.
• Use it for outdoor work, sports, travel, yard work, and summer planning.

Heat Index Calculator stays focused on the information people actually need:

• what the heat index feels like
• whether the day is getting risky
• which station is giving the best local reading
• what the forecast looks like for the rest of the day

If you want a simple heat index calculator with NOAA weather, station data, and a clean layout, this app keeps it practical.