Abstract: A temperature monitor for remote temperature monitoring is provided. The temperature monitor includes a display screen and at least one user-operable key or switch. A communication unit, typically in the form of a cellular telephone module or modem, is provided for transmitting and receiving signals. A temperature sensor measures ambient temperature. A processor unit is programmable with an upper temperature setpoint and a lower temperature setpoint and these are stored in the processor unit and compared against the measured ambient temperature. The processor unit controls the communication unit to transmit an alarm signal if the measured ambient temperature is above the upper temperature setpoint or below the lower temperature setpoint. The processor unit also controls the communication unit to transmit a status signal when the communication unit receives a demand signal, typically from a cellular telephone or other portable electronic device.