Taylors 13.25 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 -40F to 120F (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 left up year-round without worry of damage or inaccurate readings due to extreme temperatures.