Get printable thermometer 2020-2024

The instruments should be at a level of 4 to 4.5 feet above the ground. The shelter door should face north so that sunlight will not directly shine on the thermometer when the door is opened.

The temperature of the air, conventionally measured in a standard shelter or screen that protects the thermometer from rain and from direct sunshine, but allows the free passage of air.

0:24 1:03 Too far away from the ground and you'll get radiative cooling this is what we call the GoldilocksMoreToo far away from the ground and you'll get radiative cooling this is what we call the Goldilocks zone.

Temperatures are always measured in the shade because the “shade temperature” is the true air temperature. When sunlight shines through clear, cloud-free air, its energy is not significantly absorbed because clear air is quite transparent to sunlight.

The thermometer must be placed in the shade. If you put your thermometer in full sunlight, direct radiation from the sun is going to result in a temperature higher than what it should be. 3. Have good air flow for your thermometer.

If the thermometer is kept in direct sun for a longer period of time the temperature of its sensor will increase due to direct heat radiation from sun falling on it.

Air temperature is always measured in the shade because, in the shade, the thermometer is measuring the actual air temperature and only the air temperature. A thermometer placed in the sun measures the air temperature PLUS the temperature that the sun heats the thermometer to.

If the sensor is separate, place the sensor in a shaded area on the north side of the structure to avoid direct and radiant heat. Temperature sensors that do not have radiation shields will absorb solar energy and read higher than the ambient temperature.