Taylor’s 13.25-inch Wind Chill/Heat Index Thermometer and Hygrometer provides instant and accurate weather readings at a glance! Designed for indoor or outdoor use it measures a wide temperature range from -40 degrees F to 120 degrees F (Fahrenheit only) and the hygrometer reads humidity levels between 40- 90%. This dial thermometer also features a wind chill and heat index indication. Colorful graphics on a bright white background with bold red indicator pointers offers easy readability. The thermometer is weather-resistant and shatterproof so it can be le feet up year-round without the worry of damage or inaccurate readings due to extreme temperatures.