Monitoring apparatus for molds, optionally for injection molds, said monitoring apparatus comprising a control unit connectable to: a first sensor associable with the mold and configured for emitting a first signal representative of a deformation parameter of said mold, a second sensor also associable with the mold and configured for emitting a second signal representative of a temperature of said mold, said control unit being configured for executing a control procedure comprising the following steps: receiving the first signal from the first sensor representative of a value of the deformation parameter, receiving the second signal from the second sensor representative of a temperature value of the mold, determining at least one alert condition, characterized by the fact that the determination of the alert condition comprises: defining a value of a threshold parameter as a function of the temperature of the mold and comparing the value of the deformation parameter determined at the temperature of the mold with the value of the threshold parameter defined as a function of the temperature of the mold, or normalizing, at a reference temperature (T ref), the value of the deformation parameter determined at the temperature of the mold and comparing such value with a value of a threshold parameter defined at the reference temperature (T ref). a first sensor associable with the mold and configured for emitting a first signal representative of a deformation parameter of said mold, a second sensor also associable with the mold and configured for emitting a second signal representative of a temperature of said mold, said control unit being configured for executing a control procedure comprising the following steps: receiving the first signal from the first sensor representative of a value of the deformation parameter, receiving the second signal from the second sensor representative of a temperature value of the mold, determining at least one alert condition, receiving the first signal from the first sensor representative of a value of the deformation parameter, receiving the second signal from the second sensor representative of a temperature value of the mold, determining at least one alert condition, characterized by the fact that the determination of the alert condition comprises: defining a value of a threshold parameter as a function of the temperature of the mold and comparing the value of the deformation parameter determined at the temperature of the mold with the value of the threshold parameter defined as a function of the temperature of the mold, or normalizing, at a reference temperature (T ref), the value of the deformation parameter determined at the temperature of the mold and comparing such value with a value of a threshold parameter defined at the reference temperature (T ref). defining a value of a threshold parameter as a function of the temperature of the mold and comparing the value of the deformation parameter determined at the temperature of the mold with the value of the threshold parameter defined as a function of the temperature of the mold, or normalizing, at a reference temperature (T ref), the value of the deformation parameter determined at the temperature of the mold and comparing such value with a value of a threshold parameter defined at the reference temperature (T ref).