What tool to measure the outside temperature?

To measure outside temperature, a common tool used is a thermometer. There are various types, including digital thermometers, liquid-in-glass thermometers, and infrared thermometers. Digital thermometers provide quick readings and are often more user-friendly, while liquid-in-glass thermometers can be more traditional and visually appealing. Additionally, weather stations and smartphone apps can also provide real-time temperature readings based on location.