A rechargeable thermometer system is disclosed having a rechargeable thermometer and a charging assembly. The rechargeable thermometer is releasably engageable with the charging assembly, which in turn can be plugged into a household electrical outlet to provide charging electricity to a rechargeable battery housed within the thermometer. The thermometer is electrically connectable to the charging assembly to receive a charge so that when the thermometer is separated from the charger it can be used to sense the temperature of a food product into which the thermometer probe tip is introduced. The charging assembly has a pass-through plug to allow household appliances to be plugged into charger to receive electrical energy from the household outlet into which the charger itself is plugged. The thermometer can be held by the charger when not in use, thus ensuring the thermometer will always be fully charged prior to use.