The influence of temperature on SHM (Structural Health Monitoring) systems using guidedwaves is a major problem for their industrial deployment. One of the most used and cheapest SHM processdeveloped in aeronautic context is based on piezoelectric transducers mounted on the monitored structure.Several methods are then used to assess the presence of damage. A popular one is based on tracking changesin the static capacity of the transducers: it is an efficient damage indicator in close area surrounding thedevice and is often used as a fault diagnosis of the transducer itself. However, monitoring decision arerobustified with temperature sensors also mounted on the structure, adding wires and signal processingpost-treatments. In this article, the static capacity is used to determine the temperature on each leadzirconate titanate transducer (PZT). By imparting this additional functionality to PZT devices,supplementary instrumentation is not necessary and an estimation of the entire temperature field of thestructure is obtained. The original proposed approach is tested experimentally on a on a small compositeplate and then on a large real part of an A380 composite nacelle. The results show that the temperaturefield on the structure can be estimated with a precision of ±5 °C using a linear regression between staticcapacity and temperature