Choosing an outdoor thermometer depends on the accuracy of the data you want to collect. When it is a question of whether or not it is time to put winter tires on your vehicle and whether there is a risk of snow and ice, you must choose a thermometer or a central sensor capable of indicating the minimum temperature recorded. Whether you choose a minimum direct reading thermometer or a remote reading thermometer, make sure that the device (thermometer or sensor) is located in an open area without shelter or shade. Good to know: as a general rule, apart from occasional weather phenomena, the minimum temperature of a day (24 hours) occurs 1 hour after sunrise. If you want to observe how temperatures change to see whether plants need to be protected or retracted, the standing thermometer is particularly well suited because it is exposed to the wind as is the vegetation around it. However, the wind contributes to the drop in temperature and it is this cumulative drop in the effect of the wind that the earth and plants suffer. Whether it's how to dress to protect yourself from the cold, or whether to turn on the heater again, the glazing or lintel outdoor thermometer gives a valid indication. Even if its measurement is distorted by the proximity of the house and the shelter it provides, it reflects the real conditions of the building and the environment most often visited (premises, vehicles, city streets…). If complete and accurate outdoor temperature readings are required, a standard weather shelter and accurately calibrated thermometers should be used. Good to know: The Weather Station or Temperature Sensor Unit is a complete and practical device but it is necessary to make sure that the temperature sensors have been correctly calibrated or check their calibration before considering them reliable. There are several criteria to consider before buying a garden thermometer. Accuracy: rely on a thermometer capable of indicating the minimum temperature recorded. Installation: garden thermometers can be placed, hung on a support stand, planted or fixed with a suction cup. Meteorological functions: to optimize their use, some outdoor thermometers propose various functionalities like a rain gauge, a hygrometer or a weather vane or an indoor and outdoor temperature display. Display: Most direct reading thermometers offer temperature display in degrees Celsius °C and Fahrenheit °F.