Designed to give accurate observation of minimum temperatures in citrus areas; large scale Fahrenheit degree minimum-type thermometer of liquid-in-glass type; large red index gives lowest air temperature in same manner as with United States National Weather Service (USNWS) Official Minimum Air Thermometer; located on east side of weather shelter, with plastic shield to emulate overhead tree foliage.

Two orchard thermometers sit side-by-side beneath the umbra of a plastic cap. This cap mimics the effects of foliage on orange trees. An index inside the thermometers records the minimum temperature each night.